/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

function foo(flag: boolean): int {

  let x: int|undefined = 0;
  let y: int|undefined = 1;
  let z: int|undefined = 2;
  let w: int|undefined = 3;

  try {
    y = 1;
    if (flag) {
      throw new Error();
    }
  } catch(ex: NullPointerException) {
    z = 2;
  } catch(ex) {
    w = undefined;
  }

  return x + y! + z + w!;
}

function main() {
  let flag: boolean = false;
  
  assert(foo(flag) == 6);

  try {
    foo(!flag);
  } catch(ex) {
    flag = true;
  }

  assert(flag);
}