Language/Overview/Scoping/hiding_declaration_t16.dart

/*
 * Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion If a declaration d named n is in the namespace induced by a 
 * scope S, then d hides any declaration named n that is available in the 
 * lexically enclosing scope of S.
 * @description Checks that no static warning is produced if a local variable
 * declared inside a do-while loop shadows another local variable declared in an
 * enclosing lexical scope.
 * @author iefremov
 */
import "../../../Utils/expect.dart";

var flag = false;

once() {
  if (flag) {
    return flag;
  }
  flag = true;
  return false;
}

main() {
  var x = 1;
  do var x = 42; while (once());
  Expect.equals(1, x);
}