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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
=== tests/cases/conformance/expressions/typeGuards/typeGuardOfFormIsType.ts ===
class C1 {
>C1 : C1
p1: string;
>p1 : string
}
class C2 {
>C2 : C2
p2: number;
>p2 : number
}
class D1 extends C1 {
>D1 : D1
>C1 : C1
p3: number;
>p3 : number
}
var str: string;
>str : string
var num: number;
>num : number
var strOrNum: string | number;
>strOrNum : string | number
function isC1(x: any): x is C1 {
>isC1 : (x: any) => x is C1
>x : any
return true;
>true : true
}
function isC2(x: any): x is C2 {
>isC2 : (x: any) => x is C2
>x : any
return true;
>true : true
}
function isD1(x: any): x is D1 {
>isD1 : (x: any) => x is D1
>x : any
return true;
>true : true
}
var c1Orc2: C1 | C2;
>c1Orc2 : C1 | C2
str = isC1(c1Orc2) && c1Orc2.p1; // C1
>str = isC1(c1Orc2) && c1Orc2.p1 : string
>str : string
>isC1(c1Orc2) && c1Orc2.p1 : string
>isC1(c1Orc2) : boolean
>isC1 : (x: any) => x is C1
>c1Orc2 : C1 | C2
>c1Orc2.p1 : string
>c1Orc2 : C1
>p1 : string
num = isC2(c1Orc2) && c1Orc2.p2; // C2
>num = isC2(c1Orc2) && c1Orc2.p2 : number
>num : number
>isC2(c1Orc2) && c1Orc2.p2 : number
>isC2(c1Orc2) : boolean
>isC2 : (x: any) => x is C2
>c1Orc2 : C1 | C2
>c1Orc2.p2 : number
>c1Orc2 : C2
>p2 : number
str = isD1(c1Orc2) && c1Orc2.p1; // D1
>str = isD1(c1Orc2) && c1Orc2.p1 : string
>str : string
>isD1(c1Orc2) && c1Orc2.p1 : string
>isD1(c1Orc2) : boolean
>isD1 : (x: any) => x is D1
>c1Orc2 : C1 | C2
>c1Orc2.p1 : string
>c1Orc2 : D1
>p1 : string
num = isD1(c1Orc2) && c1Orc2.p3; // D1
>num = isD1(c1Orc2) && c1Orc2.p3 : number
>num : number
>isD1(c1Orc2) && c1Orc2.p3 : number
>isD1(c1Orc2) : boolean
>isD1 : (x: any) => x is D1
>c1Orc2 : C1 | C2
>c1Orc2.p3 : number
>c1Orc2 : D1
>p3 : number
var c2Ord1: C2 | D1;
>c2Ord1 : C2 | D1
num = isC2(c2Ord1) && c2Ord1.p2; // C2
>num = isC2(c2Ord1) && c2Ord1.p2 : number
>num : number
>isC2(c2Ord1) && c2Ord1.p2 : number
>isC2(c2Ord1) : boolean
>isC2 : (x: any) => x is C2
>c2Ord1 : C2 | D1
>c2Ord1.p2 : number
>c2Ord1 : C2
>p2 : number
num = isD1(c2Ord1) && c2Ord1.p3; // D1
>num = isD1(c2Ord1) && c2Ord1.p3 : number
>num : number
>isD1(c2Ord1) && c2Ord1.p3 : number
>isD1(c2Ord1) : boolean
>isD1 : (x: any) => x is D1
>c2Ord1 : C2 | D1
>c2Ord1.p3 : number
>c2Ord1 : D1
>p3 : number
str = isD1(c2Ord1) && c2Ord1.p1; // D1
>str = isD1(c2Ord1) && c2Ord1.p1 : string
>str : string
>isD1(c2Ord1) && c2Ord1.p1 : string
>isD1(c2Ord1) : boolean
>isD1 : (x: any) => x is D1
>c2Ord1 : C2 | D1
>c2Ord1.p1 : string
>c2Ord1 : D1
>p1 : string
var r2: C2 | D1 = isC1(c2Ord1) && c2Ord1; // C2 | D1
>r2 : C2 | D1
>isC1(c2Ord1) && c2Ord1 : D1
>isC1(c2Ord1) : boolean
>isC1 : (x: any) => x is C1
>c2Ord1 : C2 | D1
>c2Ord1 : D1
|
