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
|
=== tests/cases/conformance/expressions/typeGuards/typeGuardsOnClassProperty.ts ===
// Note that type guards affect types of variables and parameters only and
// have no effect on members of objects such as properties.
// Note that the class's property must be copied to a local variable for
// the type guard to have an effect
class D {
>D : Symbol(D, Decl(typeGuardsOnClassProperty.ts, 0, 0))
data: string | string[];
>data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
getData() {
>getData : Symbol(D.getData, Decl(typeGuardsOnClassProperty.ts, 6, 28))
var data = this.data;
>data : Symbol(data, Decl(typeGuardsOnClassProperty.ts, 8, 11))
>this.data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>this : Symbol(D, Decl(typeGuardsOnClassProperty.ts, 0, 0))
>data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
return typeof data === "string" ? data : data.join(" ");
>data : Symbol(data, Decl(typeGuardsOnClassProperty.ts, 8, 11))
>data : Symbol(data, Decl(typeGuardsOnClassProperty.ts, 8, 11))
>data.join : Symbol(Array.join, Decl(lib.es5.d.ts, --, --))
>data : Symbol(data, Decl(typeGuardsOnClassProperty.ts, 8, 11))
>join : Symbol(Array.join, Decl(lib.es5.d.ts, --, --))
}
getData1() {
>getData1 : Symbol(D.getData1, Decl(typeGuardsOnClassProperty.ts, 10, 5))
return typeof this.data === "string" ? this.data : this.data.join(" ");
>this.data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>this : Symbol(D, Decl(typeGuardsOnClassProperty.ts, 0, 0))
>data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>this.data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>this : Symbol(D, Decl(typeGuardsOnClassProperty.ts, 0, 0))
>data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>this.data.join : Symbol(Array.join, Decl(lib.es5.d.ts, --, --))
>this.data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>this : Symbol(D, Decl(typeGuardsOnClassProperty.ts, 0, 0))
>data : Symbol(D.data, Decl(typeGuardsOnClassProperty.ts, 5, 9))
>join : Symbol(Array.join, Decl(lib.es5.d.ts, --, --))
}
}
var o: {
>o : Symbol(o, Decl(typeGuardsOnClassProperty.ts, 17, 3))
prop1: number|string;
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
prop2: boolean|string;
>prop2 : Symbol(prop2, Decl(typeGuardsOnClassProperty.ts, 18, 25))
} = {
prop1: "string" ,
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 20, 5))
prop2: true
>prop2 : Symbol(prop2, Decl(typeGuardsOnClassProperty.ts, 21, 25))
}
if (typeof o.prop1 === "string" && o.prop1.toLowerCase()) {}
>o.prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
>o : Symbol(o, Decl(typeGuardsOnClassProperty.ts, 17, 3))
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
>o.prop1.toLowerCase : Symbol(String.toLowerCase, Decl(lib.es5.d.ts, --, --))
>o.prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
>o : Symbol(o, Decl(typeGuardsOnClassProperty.ts, 17, 3))
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
>toLowerCase : Symbol(String.toLowerCase, Decl(lib.es5.d.ts, --, --))
var prop1 = o.prop1;
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 26, 3))
>o.prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
>o : Symbol(o, Decl(typeGuardsOnClassProperty.ts, 17, 3))
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 17, 8))
if (typeof prop1 === "string" && prop1.toLocaleLowerCase()) { }
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 26, 3))
>prop1.toLocaleLowerCase : Symbol(String.toLocaleLowerCase, Decl(lib.es5.d.ts, --, --))
>prop1 : Symbol(prop1, Decl(typeGuardsOnClassProperty.ts, 26, 3))
>toLocaleLowerCase : Symbol(String.toLocaleLowerCase, Decl(lib.es5.d.ts, --, --))
|
