Method parseNamedClass

java/com/google/re2j/Parser.java:1498–1513

(StringIterator t, CharClass cc)

  // On failure (no class of than name), throws PatternSyntaxException.
  // On misparse, returns false; t.pos() is undefined.
  private boolean parseNamedClass(StringIterator t, CharClass cc) throws PatternSyntaxException {
    // (Go precondition check deleted.)
    String cls = t.rest();
    int i = cls.indexOf(":]");
    if (i < 0) {
      return false;
    }
    String name = cls.substring(0, i + 2); // "[:alnum:]"
    t.skipString(name);
    CharGroup g = CharGroup.POSIX_GROUPS.get(name);
    if (g == null) {
      throw new PatternSyntaxException(ERR_INVALID_CHAR_RANGE, name);
    }
    cc.appendGroup(g, (flags & RE2.FOLD_CASE) != 0);
    return true;
  }

  // RangeTables are represented as int[][], a list of triples (start, end,
  // stride).