// TODO: extended multi-line strings

static LS javaTokWithUnifiedNumbersAndIdentifiers(String s) {

  ArrayList<String> tok = new ArrayList();

  int l = s == null ? 0 : s.length();

  int i = 0, n = 0;

  while (i < l) {

    int j = i;

    char c, d;

    // scan for whitespace

    while (j < l) {

      c = s.charAt(j);

      d = j+1 >= l ? '\0' : s.charAt(j+1);

      if (c == ' ' || c == '\t' || c == '\r' || c == '\n')

        ++j;

      else if (c == '/' && d == '*') {

        do ++j; while (j < l && !s.substring(j, Math.min(j+2, l)).equals("*/"));

        j = Math.min(j+2, l);

      } else if (c == '/' && d == '/') {

        do ++j; while (j < l && "\r\n".indexOf(s.charAt(j)) < 0);

      } else

        break;

    }

    tok.add(javaTok_substringN(s, i, j));

    ++n;

    i = j;

    if (i >= l) break;

    c = s.charAt(i);

    d = i+1 >= l ? '\0' : s.charAt(i+1);

    // scan for non-whitespace

    // Special JavaX syntax: 'identifier

    if (c == '\'' && Character.isJavaIdentifierStart(d) && i+2 < l && "'\\".indexOf(s.charAt(i+2)) < 0) {

      j += 2;

      while (j < l && Character.isJavaIdentifierPart(s.charAt(j)))

        ++j;

    } else if (c == '\'' || c == '"') {

      char opener = c;

      ++j;

      while (j < l) {

        int c2 = s.charAt(j);

        if (c2 == opener || c2 == '\n' && opener == '\'') { // allow multi-line strings, but not for '

          ++j;

          break;

        } else if (c2 == '\\' && j+1 < l)

          j += 2;

        else

          ++j;

      }

    } else if (Character.isJavaIdentifierStart(c) || Character.isDigit(c)) {

      do ++j; while (j < l && (Character.isJavaIdentifierPart(s.charAt(j)) || s.charAt(j) == '\'')); // for stuff like "don't"

    } else if (c == '[' && d == '[') {

      do ++j; while (j+1 < l && !s.substring(j, j+2).equals("]]"));

      j = Math.min(j+2, l);

    } else if (c == '[' && d == '=' && i+2 < l && s.charAt(i+2) == '[') {

      do ++j; while (j+2 < l && !s.substring(j, j+3).equals("]=]"));

      j = Math.min(j+3, l);

    } else

      ++j;

    tok.add(javaTok_substringC(s, i, j));

    ++n;

    i = j;

  }

  if ((tok.size() % 2) == 0) tok.add("");

  ret tok;

}