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
|
=== tests/cases/conformance/types/mapped/mappedTypeConstraints.ts ===
function f0<T extends { a: string, b: string }>(obj: Pick<T, Extract<keyof T, 'b'>>) {
>f0 : <T extends { a: string; b: string; }>(obj: Pick<T, Extract<keyof T, 'b'>>) => void
>a : string
>b : string
>obj : Pick<T, Extract<keyof T, "b">>
obj.b;
>obj.b : T["b"]
>obj : Pick<T, Extract<keyof T, "b">>
>b : T["b"]
}
function f1<T extends { a: string, b: string }>(obj: Pick<T, Exclude<keyof T, 'a'>>) {
>f1 : <T extends { a: string; b: string; }>(obj: Pick<T, Exclude<keyof T, 'a'>>) => void
>a : string
>b : string
>obj : Pick<T, Exclude<keyof T, "a">>
obj.b;
>obj.b : T["b"]
>obj : Pick<T, Exclude<keyof T, "a">>
>b : T["b"]
}
function f2<T extends { a: string, b: string }, U extends { b: string, c: string }>(obj: Pick<T | U, keyof (T | U)>) {
>f2 : <T extends { a: string; b: string; }, U extends { b: string; c: string; }>(obj: Pick<T | U, keyof (T | U)>) => void
>a : string
>b : string
>b : string
>c : string
>obj : Pick<T | U, keyof T & keyof U>
obj.b;
>obj.b : (T | U)["b"]
>obj : Pick<T | U, keyof T & keyof U>
>b : (T | U)["b"]
}
function f3<T extends { a: string, b: string }, U extends { b: string, c: string }>(obj: Pick<T & U, keyof (T & U)>) {
>f3 : <T extends { a: string; b: string; }, U extends { b: string; c: string; }>(obj: Pick<T & U, keyof (T & U)>) => void
>a : string
>b : string
>b : string
>c : string
>obj : Pick<T & U, keyof T | keyof U>
obj.a;
>obj.a : (T & U)["a"]
>obj : Pick<T & U, keyof T | keyof U>
>a : (T & U)["a"]
obj.b;
>obj.b : (T & U)["b"]
>obj : Pick<T & U, keyof T | keyof U>
>b : (T & U)["b"]
obj.c;
>obj.c : (T & U)["c"]
>obj : Pick<T & U, keyof T | keyof U>
>c : (T & U)["c"]
}
function f4<T extends { a: string, b: string }>(obj: Record<Exclude<keyof T, 'b'> | 'c', string>) {
>f4 : <T extends { a: string; b: string; }>(obj: Record<Exclude<keyof T, 'b'> | 'c', string>) => void
>a : string
>b : string
>obj : Record<"c" | Exclude<keyof T, "b">, string>
obj.a;
>obj.a : string
>obj : Record<"c" | Exclude<keyof T, "b">, string>
>a : string
obj.c;
>obj.c : string
>obj : Record<"c" | Exclude<keyof T, "b">, string>
>c : string
}
// Repro from #28821
type TargetProps = {
>TargetProps : { foo: string; bar: string; }
foo: string,
>foo : string
bar: string
>bar : string
};
const modifier = <T extends TargetProps>(targetProps: T) => {
>modifier : <T extends TargetProps>(targetProps: T) => void
><T extends TargetProps>(targetProps: T) => { let {bar, ...rest} = targetProps; rest.foo;} : <T extends TargetProps>(targetProps: T) => void
>targetProps : T
let {bar, ...rest} = targetProps;
>bar : string
>rest : Omit<T, "bar">
>targetProps : T
rest.foo;
>rest.foo : T["foo"]
>rest : Omit<T, "bar">
>foo : T["foo"]
};
|
