} catch (XmlPullParserException e) {
                    throw new ExpressionDocumentationException(
                            "Failed to parse documentation for expression root: " + root, e);
                }
            }
        }

        return expressionDocumentation;
    }

    /**
     * <expressions>
     * <expression>

	return []clause.Interface{SoftDeleteQueryClause{Field: f, ZeroValue: parseZeroValueTag(f)}}
}

func parseZeroValueTag(f *schema.Field) sql.NullString {
	if v, ok := f.TagSettings["ZEROVALUE"]; ok {
		if _, err := now.Parse(v); err == nil {
			return sql.NullString{String: v, Valid: true}
		}
	}
	return sql.NullString{Valid: false}
}

type SoftDeleteQueryClause struct {
	ZeroValue sql.NullString
	Field     *schema.Field
}

type Macro struct {
	name   string   // The #define name.
	args   []string // Formal arguments.
	tokens []Token  // Body of macro.
}

// Tokenize turns a string into a list of Tokens; used to parse the -D flag and in tests.
func Tokenize(str string) []Token {
	t := NewTokenizer("command line", strings.NewReader(str), nil)
	var tokens []Token
	for {
		tok := t.Next()
		if tok == scanner.EOF {
			break

	}

	var uv uuid.UUID
	var err error
	if fi.VersionID != "" && fi.VersionID != nullVersionID {
		uv, err = uuid.Parse(fi.VersionID)
		if err != nil {
			return err
		}
	}

	var dd uuid.UUID
	if fi.DataDir != "" {
		dd, err = uuid.Parse(fi.DataDir)
		if err != nil {
			return err
		}
	}

	ventry := xlMetaV2Version{
		WrittenByVersion: globalVersionUnix,

		if !r.Flags.Filter.CreatedBefore.IsZero() && r.Flags.Filter.CreatedBefore.Before(oi.ModTime) {
			// skip all objects that are created after the specified time.
			return true
		}

		if hasTags {
			// Only parse object tags if tags filter is specified.
			tagMap := map[string]string{}
			tagStr := oi.UserTags
			if len(tagStr) != 0 {
				t, err := tags.ParseObjectTags(tagStr)
				if err != nil {
					return false
				}

    }

    float[] toFloatArray() {
      return Arrays.copyOfRange(array, start, end);
    }

    private static final long serialVersionUID = 0;
  }

  /**
   * Parses the specified string as a single-precision floating point value. The ASCII character
   * {@code '-'} (<code>'&#92;u002D'</code>) is recognized as the minus sign.
   *

    fpPattern =
        fpPattern.replace(
            "#",
            "+"
            );
    return
    java.util.regex.Pattern
        .compile(fpPattern);
  }

  /**
   * Parses the specified string as a double-precision floating point value. The ASCII character
   * {@code '-'} (<code>'&#92;u002D'</code>) is recognized as the minus sign.
   *

    }

    float[] toFloatArray() {
      return Arrays.copyOfRange(array, start, end);
    }

    private static final long serialVersionUID = 0;
  }

  /**
   * Parses the specified string as a single-precision floating point value. The ASCII character
   * {@code '-'} (<code>'&#92;u002D'</code>) is recognized as the minus sign.
   *

        try {
            return versionParser.parseVersionRange(range);
        } catch (VersionParserException e) {
            throw new AssertionError(range + " should be valid but failed to parse due to: " + e.getMessage(), e);
        }
    }

    private void parseInvalid(String range) {
        try {
            versionParser.parseVersionRange(range);
            fail(range + " should be invalid");

	flag.Uint64Var(&value, "value", 0, "attribute value expects the value to be uint64")
	flag.BoolVar(&set, "set", false, "this is a set attribute operation")

	flag.Parse()

	if set && value == 0 {
		log.Fatalln("setting an attribute requires a non-zero value")
	}

	if !set && value > 0 {
		log.Fatalln("to set a value please specify --set along with --value")
	}