File: typeGuardOfFormExpr1AndExpr2.types

package info (click to toggle)
node-typescript 2.1.5-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 203,952 kB
  • ctags: 52,987
  • sloc: sh: 11; makefile: 5
file content (149 lines) | stat: -rw-r--r-- 5,249 bytes parent folder | download | duplicates (2)
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
145
146
147
148
149
=== tests/cases/conformance/expressions/typeGuards/typeGuardOfFormExpr1AndExpr2.ts ===
var str: string;
>str : string

var bool: boolean;
>bool : boolean

var num: number;
>num : number

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

var strOrNumOrBool: string | number | boolean;
>strOrNumOrBool : string | number | boolean

var numOrBool: number | boolean;
>numOrBool : number | boolean

class C { private p; }
>C : C
>p : any

var c: C;
>c : C
>C : C

var cOrBool: C| boolean;
>cOrBool : boolean | C
>C : C

var strOrNumOrBoolOrC: string | number | boolean | C;
>strOrNumOrBoolOrC : string | number | boolean | C
>C : C

// A type guard of the form expr1 && expr2
//  - when true, narrows the type of x by expr1 when true and then by expr2 when true, or
//  - when false, narrows the type of x to T1 | T2, where T1 is the type of x narrowed by expr1 when 
//    false, and T2 is the type of x narrowed by expr1 when true and then by expr2 when false.

// (typeguard1 && typeguard2)
if (typeof strOrNumOrBool !== "string" && typeof strOrNumOrBool !== "number") {
>typeof strOrNumOrBool !== "string" && typeof strOrNumOrBool !== "number" : boolean
>typeof strOrNumOrBool !== "string" : boolean
>typeof strOrNumOrBool : string
>strOrNumOrBool : string | number | boolean
>"string" : "string"
>typeof strOrNumOrBool !== "number" : boolean
>typeof strOrNumOrBool : string
>strOrNumOrBool : number | boolean
>"number" : "number"

    bool = strOrNumOrBool; // boolean
>bool = strOrNumOrBool : boolean
>bool : boolean
>strOrNumOrBool : boolean
}
else {
    strOrNum = strOrNumOrBool; // string | number
>strOrNum = strOrNumOrBool : string | number
>strOrNum : string | number
>strOrNumOrBool : string | number
}
// (typeguard1 && typeguard2 && typeguard3)
if (typeof strOrNumOrBoolOrC !== "string" && typeof strOrNumOrBoolOrC !== "number" && typeof strOrNumOrBoolOrC !== "boolean") {
>typeof strOrNumOrBoolOrC !== "string" && typeof strOrNumOrBoolOrC !== "number" && typeof strOrNumOrBoolOrC !== "boolean" : boolean
>typeof strOrNumOrBoolOrC !== "string" && typeof strOrNumOrBoolOrC !== "number" : boolean
>typeof strOrNumOrBoolOrC !== "string" : boolean
>typeof strOrNumOrBoolOrC : string
>strOrNumOrBoolOrC : string | number | boolean | C
>"string" : "string"
>typeof strOrNumOrBoolOrC !== "number" : boolean
>typeof strOrNumOrBoolOrC : string
>strOrNumOrBoolOrC : number | boolean | C
>"number" : "number"
>typeof strOrNumOrBoolOrC !== "boolean" : boolean
>typeof strOrNumOrBoolOrC : string
>strOrNumOrBoolOrC : boolean | C
>"boolean" : "boolean"

    c = strOrNumOrBoolOrC; // C
>c = strOrNumOrBoolOrC : C
>c : C
>strOrNumOrBoolOrC : C
}
else {
    strOrNumOrBool = strOrNumOrBoolOrC; // string | number | boolean
>strOrNumOrBool = strOrNumOrBoolOrC : string | number | boolean
>strOrNumOrBool : string | number | boolean
>strOrNumOrBoolOrC : string | number | boolean
}
// (typeguard1 && typeguard2 && typeguard11(onAnotherType))
if (typeof strOrNumOrBoolOrC !== "string" && typeof strOrNumOrBoolOrC !== "number" && typeof strOrNumOrBool === "boolean") {
>typeof strOrNumOrBoolOrC !== "string" && typeof strOrNumOrBoolOrC !== "number" && typeof strOrNumOrBool === "boolean" : boolean
>typeof strOrNumOrBoolOrC !== "string" && typeof strOrNumOrBoolOrC !== "number" : boolean
>typeof strOrNumOrBoolOrC !== "string" : boolean
>typeof strOrNumOrBoolOrC : string
>strOrNumOrBoolOrC : string | number | boolean | C
>"string" : "string"
>typeof strOrNumOrBoolOrC !== "number" : boolean
>typeof strOrNumOrBoolOrC : string
>strOrNumOrBoolOrC : number | boolean | C
>"number" : "number"
>typeof strOrNumOrBool === "boolean" : boolean
>typeof strOrNumOrBool : string
>strOrNumOrBool : string | number | boolean
>"boolean" : "boolean"

    cOrBool = strOrNumOrBoolOrC; // C | boolean
>cOrBool = strOrNumOrBoolOrC : boolean | C
>cOrBool : boolean | C
>strOrNumOrBoolOrC : boolean | C

    bool = strOrNumOrBool; // boolean
>bool = strOrNumOrBool : boolean
>bool : boolean
>strOrNumOrBool : boolean
}
else {
    var r1: string | number | boolean | C = strOrNumOrBoolOrC; // string | number | boolean | C
>r1 : string | number | boolean | C
>C : C
>strOrNumOrBoolOrC : string | number | boolean | C

    var r2: string | number | boolean = strOrNumOrBool;
>r2 : string | number | boolean
>strOrNumOrBool : string | number | boolean
}
// (typeguard1) && simpleExpr
if (typeof strOrNumOrBool !== "string" && numOrBool !== strOrNumOrBool) {
>typeof strOrNumOrBool !== "string" && numOrBool !== strOrNumOrBool : boolean
>typeof strOrNumOrBool !== "string" : boolean
>typeof strOrNumOrBool : string
>strOrNumOrBool : string | number | boolean
>"string" : "string"
>numOrBool !== strOrNumOrBool : boolean
>numOrBool : number | boolean
>strOrNumOrBool : number | boolean

    numOrBool = strOrNumOrBool; // number | boolean
>numOrBool = strOrNumOrBool : number | boolean
>numOrBool : number | boolean
>strOrNumOrBool : number | boolean
}
else {
    var r3: string | number | boolean = strOrNumOrBool; // string | number | boolean
>r3 : string | number | boolean
>strOrNumOrBool : string | number | boolean
}