CharacterClassRangeSet.java 文件源码

@Override public String toString() {
    final List<String> ranges = new ArrayList<>();

    rangeSet.asRanges().forEach(range -> {
        if(!range.isEmpty()) {
            Range<Integer> closedRange = ContiguousSet.create(range, DiscreteDomain.integers()).range();
            final int from = closedRange.lowerEndpoint();
            final int to = closedRange.upperEndpoint();

            if(from != to)
                ranges.add("" + from + "-" + to);
            else
                ranges.add("" + from);
        }
    });

    if(containsEOF)
        ranges.add("EOF");

    return "[" + String.join(",", ranges) + "]";
}