* value).hashCode()}.
   *
   * <p><b>Java 8+ users:</b> use {@link Double#hashCode(double)} instead.
   *
   * @param value a primitive {@code double} value
   * @return a hash code for the value
   */
  public static int hashCode(double value) {
    return ((Double) value).hashCode();
    // TODO(kevinb): do it this way when we can (GWT problem):
    // long bits = Double.doubleToLongBits(value);

  public static int roundToInt(double x, RoundingMode mode) {
    double z = roundIntermediate(x, mode);
    checkInRangeForRoundingInputs(
        z > MIN_INT_AS_DOUBLE - 1.0 & z < MAX_INT_AS_DOUBLE + 1.0, x, mode);
    return (int) z;
  }

  private static final double MIN_INT_AS_DOUBLE = -0x1p31;
  private static final double MAX_INT_AS_DOUBLE = 0x1p31 - 1.0;

  /**

  }

  public void testLog2NaNInfinity() {
    assertEquals(Double.POSITIVE_INFINITY, DoubleMath.log2(Double.POSITIVE_INFINITY));
    assertTrue(Double.isNaN(DoubleMath.log2(Double.NEGATIVE_INFINITY)));
    assertTrue(Double.isNaN(DoubleMath.log2(Double.NaN)));
  }

  @GwtIncompatible // StrictMath
  private strictfp double trueLog2(double d) {

                },
                new double[] {(double) 2, (double) 3, (double) 4}))
        .isEqualTo(2);
    assertThat(
            Doubles.indexOf(
                new double[] {
                  (double) 2, (double) 2, (double) 3, (double) 4, (double) 2, (double) 3, (double) 4
                },
                new double[] {(double) 2, (double) 3, (double) 4}))

                },
                new double[] {(double) 2, (double) 3, (double) 4}))
        .isEqualTo(2);
    assertThat(
            Doubles.indexOf(
                new double[] {
                  (double) 2, (double) 2, (double) 3, (double) 4, (double) 2, (double) 3, (double) 4
                },
                new double[] {(double) 2, (double) 3, (double) 4}))

   *
   * <p>If the dataset contains {@link Double#NaN} then the result is {@link Double#NaN}. If it
   * contains both {@link Double#POSITIVE_INFINITY} and {@link Double#NEGATIVE_INFINITY} then the
   * result is {@link Double#NaN}. If it contains {@link Double#POSITIVE_INFINITY} and finite values
   * only or {@link Double#POSITIVE_INFINITY} only, the result is {@link Double#POSITIVE_INFINITY}.

  }

  public void testLog2NaNInfinity() {
    assertEquals(Double.POSITIVE_INFINITY, DoubleMath.log2(Double.POSITIVE_INFINITY));
    assertTrue(Double.isNaN(DoubleMath.log2(Double.NEGATIVE_INFINITY)));
    assertTrue(Double.isNaN(DoubleMath.log2(Double.NaN)));
  }

  @GwtIncompatible // StrictMath
  private strictfp double trueLog2(double d) {

     * @param pattern
     *            パターン文字列
     * @return 変換された{@link Double}
     */
    public static Double toDouble(final Object o, final String pattern) {
        if (o == null) {
            return null;
        } else if (o instanceof Double) {
            return (Double) o;
        } else if (o instanceof Number) {
            return new Double(((Number) o).doubleValue());
        } else if (o instanceof String) {

            ConstantValueKind.UnsignedShort -> KtConstantValue.KtUnsignedShortConstantValue(value as UShort, psi)

            ConstantValueKind.Double -> KtConstantValue.KtDoubleConstantValue(value as Double, psi)
            ConstantValueKind.Float -> KtConstantValue.KtFloatConstantValue(value as Float, psi)

        case HALF_UP:
          return Double.MAX_VALUE * sign(x);
        case FLOOR:
          return (roundArbitrarily == Double.POSITIVE_INFINITY)
              ? Double.MAX_VALUE
              : Double.NEGATIVE_INFINITY;
        case CEILING:
          return (roundArbitrarily == Double.POSITIVE_INFINITY)
              ? Double.POSITIVE_INFINITY
              : -Double.MAX_VALUE;
        case UP: