1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
//// [logicalAssignment4.ts]
function foo1(results: number[] | undefined) {
(results ||= []).push(100);
}
function foo2(results: number[] | undefined) {
(results ??= []).push(100);
}
function foo3(results: number[] | undefined) {
results ||= [];
results.push(100);
}
function foo4(results: number[] | undefined) {
results ??= [];
results.push(100);
}
interface ThingWithOriginal {
name: string;
original?: ThingWithOriginal
}
declare const v: number
function doSomethingWithAlias(thing: ThingWithOriginal | undefined, defaultValue: ThingWithOriginal | undefined) {
if (v === 1) {
if (thing &&= thing.original) {
thing.name;
}
}
else if (v === 2) {
if (thing &&= defaultValue) {
thing.name;
defaultValue.name
}
}
else if (v === 3) {
if (thing ||= defaultValue) {
thing.name;
defaultValue.name;
}
}
else {
if (thing ??= defaultValue) {
thing.name;
defaultValue.name;
}
}
}
//// [logicalAssignment4.js]
"use strict";
function foo1(results) {
(results || (results = [])).push(100);
}
function foo2(results) {
(results !== null && results !== void 0 ? results : (results = [])).push(100);
}
function foo3(results) {
results || (results = []);
results.push(100);
}
function foo4(results) {
results !== null && results !== void 0 ? results : (results = []);
results.push(100);
}
function doSomethingWithAlias(thing, defaultValue) {
if (v === 1) {
if (thing && (thing = thing.original)) {
thing.name;
}
}
else if (v === 2) {
if (thing && (thing = defaultValue)) {
thing.name;
defaultValue.name;
}
}
else if (v === 3) {
if (thing || (thing = defaultValue)) {
thing.name;
defaultValue.name;
}
}
else {
if (thing !== null && thing !== void 0 ? thing : (thing = defaultValue)) {
thing.name;
defaultValue.name;
}
}
}
|
