/*
 * 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.
 */
import assert from 'assert';
// top-level var
var j: number = 1;
assert.strictEqual(j, 1);
// var be can defined multi times
var j: number = 2;
assert.strictEqual(j, 2);
function g(): () => string {
    // function scope var
    var q: string = 'hello';
    assert.strictEqual(q + ' world', 'hello world');
    return function r(): string {
        // lexical var
        var s: string = q + '!';
        return s;
    };
}
assert.strictEqual(g()(), 'hello!');
var k: () => string = g();
assert.strictEqual(k(), 'hello!');
function h(): number {
    var o: number = 1;
    o = 2;
    // function declaration hoisting
    var p: number = n();
    assert.strictEqual(p, 2);
    o = 3;
    assert.strictEqual(o, 3);
    return p;
    function n(): number {
        return o;
    }
}
assert.strictEqual(h(), 2);
function i(l: boolean): number | undefined {
    if (l) {
        var m: number = 10;
    }
    // var hoisting
    return m;
}
assert.strictEqual(i(true), 10);
assert.strictEqual(i(false), undefined);
