File: typeGuardOfFormInstanceOfOnInterface.types

package info (click to toggle)
node-typescript 3.3.3333-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 324,548 kB
  • sloc: makefile: 6; sh: 3
file content (139 lines) | stat: -rw-r--r-- 3,126 bytes parent folder | download | duplicates (5)
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
=== tests/cases/conformance/expressions/typeGuards/typeGuardOfFormInstanceOfOnInterface.ts ===
// A type guard of the form x instanceof C, where C is of a subtype of the global type 'Function' 
// and C has a property named 'prototype'
//  - when true, narrows the type of x to the type of the 'prototype' property in C provided 
//    it is a subtype of the type of x, or
//  - when false, has no effect on the type of x.

interface C1 {
    (): C1;
    prototype: C1;
>prototype : C1

    p1: string;
>p1 : string
}
interface C2 {
    (): C2;
    prototype: C2;
>prototype : C2

    p2: number;
>p2 : number
}
interface D1 extends C1 {
    prototype: D1;
>prototype : D1

    p3: number;
>p3 : number
}
var str: string;
>str : string

var num: number;
>num : number

var strOrNum: string | number;
>strOrNum : string | number

var c1: C1;
>c1 : C1

var c2: C2;
>c2 : C2

var d1: D1;
>d1 : D1

var c1Orc2: C1 | C2;
>c1Orc2 : C1 | C2

str = c1Orc2 instanceof c1 && c1Orc2.p1; // C1
>str = c1Orc2 instanceof c1 && c1Orc2.p1 : string
>str : string
>c1Orc2 instanceof c1 && c1Orc2.p1 : string
>c1Orc2 instanceof c1 : boolean
>c1Orc2 : C1 | C2
>c1 : C1
>c1Orc2.p1 : string
>c1Orc2 : C1
>p1 : string

num = c1Orc2 instanceof c2 && c1Orc2.p2; // C2
>num = c1Orc2 instanceof c2 && c1Orc2.p2 : number
>num : number
>c1Orc2 instanceof c2 && c1Orc2.p2 : number
>c1Orc2 instanceof c2 : boolean
>c1Orc2 : C1 | C2
>c2 : C2
>c1Orc2.p2 : number
>c1Orc2 : C2
>p2 : number

str = c1Orc2 instanceof d1 && c1Orc2.p1; // C1
>str = c1Orc2 instanceof d1 && c1Orc2.p1 : string
>str : string
>c1Orc2 instanceof d1 && c1Orc2.p1 : string
>c1Orc2 instanceof d1 : boolean
>c1Orc2 : C1 | C2
>d1 : D1
>c1Orc2.p1 : string
>c1Orc2 : D1
>p1 : string

num = c1Orc2 instanceof d1 && c1Orc2.p3; // D1
>num = c1Orc2 instanceof d1 && c1Orc2.p3 : number
>num : number
>c1Orc2 instanceof d1 && c1Orc2.p3 : number
>c1Orc2 instanceof d1 : boolean
>c1Orc2 : C1 | C2
>d1 : D1
>c1Orc2.p3 : number
>c1Orc2 : D1
>p3 : number

var c2Ord1: C2 | D1;
>c2Ord1 : C2 | D1

num = c2Ord1 instanceof c2 && c2Ord1.p2; // C2
>num = c2Ord1 instanceof c2 && c2Ord1.p2 : number
>num : number
>c2Ord1 instanceof c2 && c2Ord1.p2 : number
>c2Ord1 instanceof c2 : boolean
>c2Ord1 : C2 | D1
>c2 : C2
>c2Ord1.p2 : number
>c2Ord1 : C2
>p2 : number

num = c2Ord1 instanceof d1 && c2Ord1.p3; // D1
>num = c2Ord1 instanceof d1 && c2Ord1.p3 : number
>num : number
>c2Ord1 instanceof d1 && c2Ord1.p3 : number
>c2Ord1 instanceof d1 : boolean
>c2Ord1 : C2 | D1
>d1 : D1
>c2Ord1.p3 : number
>c2Ord1 : D1
>p3 : number

str = c2Ord1 instanceof d1 && c2Ord1.p1; // D1
>str = c2Ord1 instanceof d1 && c2Ord1.p1 : string
>str : string
>c2Ord1 instanceof d1 && c2Ord1.p1 : string
>c2Ord1 instanceof d1 : boolean
>c2Ord1 : C2 | D1
>d1 : D1
>c2Ord1.p1 : string
>c2Ord1 : D1
>p1 : string

var r2: D1 | C2 = c2Ord1 instanceof c1 && c2Ord1; // C2 | D1
>r2 : C2 | D1
>c2Ord1 instanceof c1 && c2Ord1 : D1
>c2Ord1 instanceof c1 : boolean
>c2Ord1 : C2 | D1
>c1 : C1
>c2Ord1 : D1