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
93
94
95
96
|
=== tests/cases/compiler/nestedLoopTypeGuards.ts ===
// Repros from #10378
function f1() {
>f1 : () => void
var a: boolean | number | string;
>a : string | number | boolean
if (typeof a !== 'boolean') {
>typeof a !== 'boolean' : boolean
>typeof a : string
>a : string | number | boolean
>'boolean' : "boolean"
// a is narrowed to "number | string"
for (var i = 0; i < 1; i++) {
>i : number
>0 : 0
>i < 1 : boolean
>i : number
>1 : 1
>i++ : number
>i : number
for (var j = 0; j < 1; j++) {}
>j : number
>0 : 0
>j < 1 : boolean
>j : number
>1 : 1
>j++ : number
>j : number
if (typeof a === 'string') {
>typeof a === 'string' : boolean
>typeof a : string
>a : string | number
>'string' : "string"
// a is narrowed to "string'
for (var j = 0; j < 1; j++) {
>j : number
>0 : 0
>j < 1 : boolean
>j : number
>1 : 1
>j++ : number
>j : number
a.length; // Should not error here
>a.length : number
>a : string
>length : number
}
}
}
}
}
function f2() {
>f2 : () => void
var a: string | number;
>a : string | number
if (typeof a === 'string') {
>typeof a === 'string' : boolean
>typeof a : string
>a : string | number
>'string' : "string"
while (1) {
>1 : 1
while (1) {}
>1 : 1
if (typeof a === 'string') {
>typeof a === 'string' : boolean
>typeof a : string
>a : string
>'string' : "string"
while (1) {
>1 : 1
a.length; // Should not error here
>a.length : number
>a : string
>length : number
}
}
}
}
}
|
