*
   * <p><b>Comparison to {@code java.util.Optional}:</b> no differences.
   */
  public abstract boolean isPresent();

  /**
   * Returns the contained instance, which must be present. If the instance might be absent, use
   * {@link #or(Object)} or {@link #orNull} instead.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> when the value is absent, this method

                    } else {
                        int comparison = res1.getLowerBound().compareTo(res2.getLowerBound());
                        if (comparison < 0) {
                            lower = res2.getLowerBound();
                            lowerInclusive = res2.isLowerBoundInclusive();
                        } else if (comparison == 0) {
                            lower = res1.getLowerBound();

import java.util.Deque;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.Properties;

/**
 * <p>
 * Generic implementation of version comparison.
 * </p>
 * <p>
 * Features:
 * <ul>
 * <li>mixing of '<code>-</code>' (hyphen) and '<code>.</code>' (dot) separators,</li>
 * <li>transition between characters and digits also constitutes a separator:

	case float64:
		v.value = -x
	case int64:
		v.value = -x
	}
}

// Value comparison functions: we do not expose them outside the
// module. Logical operators "<", ">", ">=", "<=" work on strings and
// numbers. Equality operators "=", "!=" work on strings,
// numbers and booleans.

// Supported comparison operators
const (
	opLt    = "<"
	opLte   = "<="
	opGt    = ">"
	opGte   = ">="

// IsARM64ADR reports whether the op (as defined by an arm64.A* constant) is
// one of the comparison instructions that require special handling.
func IsARM64ADR(op obj.As) bool {
	switch op {
	case arm64.AADR, arm64.AADRP:
		return true
	}
	return false
}

// IsARM64CMP reports whether the op (as defined by an arm64.A* constant) is
// one of the comparison instructions that require special handling.
func IsARM64CMP(op obj.As) bool {

                            result = -1;
                        }
                    }
                    if (result == 0) {
                        // We don't consider the version range in the comparison, just the resolved version
                        result = new DefaultArtifactVersion(version)
                                .compareTo(new DefaultArtifactVersion(a.getVersion()));
                    }
                }

      int permutations = 1;
      int n = 1;
      int r = 1;
      while (n < sortedInputList.size()) {
        int comparison = comparator.compare(sortedInputList.get(n - 1), sortedInputList.get(n));
        if (comparison < 0) {
          // We move to the next non-repeated element.
          permutations = IntMath.saturatedMultiply(permutations, IntMath.binomial(n, r));
          r = 0;

     * Works on known set that failed before fix, provided by {@link #uuidVersionStringStream()}.
     */
    @Test
    void testCompareUuidVersionStringStream() {
        // this operation below fails with IAEx if comparison is unstable
        uuidVersionStringStream().map(this::newVersion).sorted().collect(toList());
    }

    private Stream<String> uuidVersionStringStream() {
        return Stream.of(

type ConditionRHS struct {
	Compare *Compare `parser:"  @@"`
	Between *Between `parser:"| @@"`
	In      *In      `parser:"| \"IN\" @@"`
	Like    *Like    `parser:"| @@"`
}

// Compare represents the RHS of a comparison expression
type Compare struct {
	Operator string   `parser:"@( \"<>\" | \"<=\" | \">=\" | \"=\" | \"<\" | \">\" | \"!=\" | \"IS\" \"NOT\" | \"IS\")"`
	Operand  *Operand `parser:"  @@"`
}

        return this.address;
    }


    /**
     * Determines if this address is equal two another. Only the IP Addresses
     * are compared. Similar to the {@link #hashCode} method, the comparison
     * is based on the integer IP address and not the string representation.
     */

    @Override
    public boolean equals ( Object obj ) {