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1/*
2 * Copyright (c) 2024-2025 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16class C {}
17
18function foo(arg?: boolean): C | undefined {
19    if (arg == undefined) {
20        return undefined;
21    }
22    return arg == false ? undefined : new C();
23}
24
25function bar(arg?: boolean): C | undefined {
26    if (arg == true) return new C();
27    return arg == false ? undefined : new C();
28}
29
30function baz(arg?: boolean): int {
31    if (arg == undefined) return 0;
32    assertEQ(typeof arg, "boolean")
33    return 1;
34}
35
36function main() {
37    assertTrue(foo(true) instanceof C)
38    assertEQ(foo(false), undefined)
39    assertEQ(foo(), undefined)
40
41    assertTrue(bar(true) instanceof C)
42    assertEQ(bar(false), undefined)
43    assertTrue(bar() instanceof C)
44
45    assertEQ(baz(true), 1)
46    assertEQ(baz(false), 1)
47    assertEQ(baz(), 0)
48}