svoid tok_ifCast(L<S> tok) {
  int i;
  while ((i = jfind_check cast(tok, "if (<id> cast <id>")) >= 0) {
    int iEndOfType = indexOfAny(tok, i, ")", "&");
    int iClosing = tok_endOfExpression(tok, i+4)+1;
    S var = tok.get(i+4), type = joinSubList(tok, i+8, iEndOfType-1);
    S rawType = tok_dropTypeParameters(type);
    int start = iClosing+2, end = tok_findEndOfStatement(tok, start);
    replaceTokens(tok, i+6, iEndOfType-1, "instanceof " + rawType);
    
    // replace "var" with "((Type) var)" in enclosed block
    // unless it's another cast expression or an assignment
    
    printVars(+iEndOfType, +iClosing, iClosing := get(tok, iClosing), +start, start := get(tok, start), +end, lTok := l(tok));
    end = min(end, l(tok));
    
    for (int j = iEndOfType; j < end; j += 2)
      if (eq(tok.get(j), var) && neqGet(tok, j-2, ".")
        && neqGet(tok, j+2, "cast")
        && !tok_isAssignment(tok, j+2))
        tok_insertCast(tok, j, type);
    reTok(tok, i+6, end);
  }
}