+++ /dev/null
-package edu.berkeley.sbp.chr;
-import java.io.*;
-import java.util.*;
-import java.lang.reflect.*;
-import java.lang.ref.*;
-import edu.berkeley.sbp.*;
-import edu.berkeley.sbp.util.*;
-import edu.berkeley.sbp.misc.*;
-import edu.berkeley.sbp.Input.Location;
-
-public class CharRange extends Atom<Character> {
-
- public CharRange(char a) { this(a,a); }
- public CharRange(char a, char b) { this(new CharTopology(a, b)); }
- public CharRange(CharTopology t) { this.t = t; }
-
- private CharTopology t;
- public Topology<Character> top() { return t; }
-
- public static final char left = (char)9998;
- public static final char right = (char)9999;
- public static final Atom leftBrace = new CharRange(left,left) { public String toString() { return "[{]"; } };
- public static final Atom rightBrace = new CharRange(right,right) { public String toString() { return "[}]"; } };
- public static final Atom braces = new CharRange(left,right) { public String toString() { return "[{}]"; } };
-
- public static Atom set(Range.Set r) { return new CharRange(new CharTopology(r)); }
-
- public String toString() { return t.toString(); }
-
- /** returns an element which exactly matches the string given */
- public static Element string(String s) { return string(s, true); }
- public static Element string(String s, boolean share) {
- if (share && s.length() == 0) return epsilon;
- final String escapified = "\""+StringUtil.escapify(s, "\"\r\n\\")+"\"";
- Element ret;
- if (share && s.length() == 1) {
- ret =
- new CharRange(s.charAt(0)) {
- public String toString() { return escapified; } };
- } else {
- Union ret2 = new Union("\""+s+"\"_str", true) {
- public String toString() { return escapified; } };
- Element[] refs = new Element[s.length()];
- for(int i=0; i<refs.length; i++) refs[i] = new CharRange(s.charAt(i));
- ret2.add(Sequence.constant(refs, s));
- ret = ret2;
- }
- return ret;
- }
-
- private static Union epsilon = new Union("()");
- static { epsilon.add(Sequence.empty); }
-}