1 package edu.berkeley.sbp.misc;
4 import java.lang.reflect.*;
5 import java.lang.ref.*;
6 import edu.berkeley.sbp.*;
7 import edu.berkeley.sbp.Token.Location;
8 import edu.berkeley.sbp.util.*;
10 public class CharRange extends Atom<CharToken> {
11 private String esc(char c) { return StringUtil.escapify(c+"", "[]-~\\\"\'"); }
12 private Topology<CharToken> t;
13 public CharRange(Topology<CharToken> t) { this.t = t; }
14 public Topology<CharToken> top() { return t; }
15 public String toString() {
16 StringBuffer sb = new StringBuffer();
18 Range.Set ranges = ((IntegerTopology)top()).getRanges();
19 if (ranges.size() == -1 || ranges.size() > Character.MAX_VALUE/2) {
21 ranges = ranges.complement();
23 ranges = ranges.intersect(CharToken.all);
24 for(Range r : ranges) {
25 if (r.isMinNegInf() || r.isMaxPosInf()) throw new Error("should not happen");
26 if (r.getMin()==r.getMax()) {
27 sb.append(esc((char)r.getMin()));
29 sb.append(esc((char)r.getMin()));
31 sb.append(esc((char)r.getMax()));