- public static class CharRange extends Atom<CharToken> {
- private String esc(char c) { return StringUtil.escapify(c+"", "[]-~\\\"\'"); }
- private Topology<CharToken> t;
- public CharRange(Topology<CharToken> t) { this.t = t; }
- public Topology<CharToken> top() { return t; }
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append('[');
- Range.Set ranges = ((IntegerTopology)top()).getRanges();
- if (ranges.size() == -1 || ranges.size() > Character.MAX_VALUE/2) {
- sb.append('~');
- ranges = ranges.complement();
- }
- ranges = ranges.intersect(all);
- for(Range r : ranges) {
- if (r.isMinNegInf() || r.isMaxPosInf()) throw new Error("should not happen");
- if (r.getMin()==r.getMax()) {
- sb.append(esc((char)r.getMin()));
- } else{
- sb.append(esc((char)r.getMin()));
- sb.append('-');
- sb.append(esc((char)r.getMax()));
- }
- }
- sb.append(']');
- return sb.toString();
- }
- }
-