File: mappedTypeAsClauses.errors.txt

package info (click to toggle)
node-typescript 5.0.4%2Bds1-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 459,140 kB
  • sloc: javascript: 1,972,754; makefile: 6; sh: 1
file content (158 lines) | stat: -rw-r--r-- 5,798 bytes parent folder | download | duplicates (3)
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
150
151
152
153
154
155
156
157
158
tests/cases/conformance/types/mapped/mappedTypeAsClauses.ts(130,3): error TS2345: Argument of type '"a"' is not assignable to parameter of type '"b"'.


==== tests/cases/conformance/types/mapped/mappedTypeAsClauses.ts (1 errors) ====
    // Mapped type 'as N' clauses
    
    type Getters<T> = { [P in keyof T & string as `get${Capitalize<P>}`]: () => T[P] };
    type TG1 = Getters<{ foo: string, bar: number, baz: { z: boolean } }>;
    
    // Mapped type with 'as N' clause has no constraint on 'in T' clause
    
    type PropDef<K extends keyof any, T> = { name: K, type: T };
    
    type TypeFromDefs<T extends PropDef<keyof any, any>> = { [P in T as P['name']]: P['type'] };
    
    type TP1 = TypeFromDefs<{ name: 'a', type: string } | { name: 'b', type: number } | { name: 'a', type: boolean }>;
    
    // No array or tuple type mapping when 'as N' clause present
    
    type TA1 = Getters<string[]>;
    type TA2 = Getters<[number, boolean]>;
    
    // Filtering using 'as N' clause
    
    type Methods<T> = { [P in keyof T as T[P] extends Function ? P : never]: T[P] };
    type TM1 = Methods<{ foo(): number, bar(x: string): boolean, baz: string | number }>;
    
    // Mapping to multiple names using 'as N' clause
    
    type DoubleProp<T> = { [P in keyof T & string as `${P}1` | `${P}2`]: T[P] }
    type TD1 = DoubleProp<{ a: string, b: number }>;  // { a1: string, a2: string, b1: number, b2: number }
    type TD2 = keyof TD1;  // 'a1' | 'a2' | 'b1' | 'b2'
    type TD3<U> = keyof DoubleProp<U>;  // `${keyof U & string}1` | `${keyof U & string}2`
    
    // Repro from #40619
    
    type Lazyify<T> = {
        [K in keyof T as `get${Capitalize<K & string>}`]: () => T[K]
    };
    
    interface Person {
        readonly name: string;
        age: number;
        location?: string;
    }
    
    type LazyPerson = Lazyify<Person>;
    
    // Repro from #40833
    
    type Example = {foo: string, bar: number};
    
    type PickByValueType<T, U> = {
      [K in keyof T as T[K] extends U ? K : never]: T[K]
    };
    
    type T1 = PickByValueType<Example, string>;
    const e1: T1 = {
        foo: "hello"
    };
    type T2 = keyof T1;
    const e2: T2 = "foo";
    
    // Repro from #41133
    
    interface Car {
        name: string;
        seats: number;
        engine: Engine;
        wheels: Wheel[];
    }
    
    interface Engine {
        manufacturer: string;
        horsepower: number;
    }
    
    interface Wheel {
        type: "summer" | "winter";
        radius: number;
    }
    
    type Primitive = string | number | boolean;
    type OnlyPrimitives<T> = { [K in keyof T as T[K] extends Primitive ? K : never]: T[K] };
    
    let primitiveCar: OnlyPrimitives<Car>;  // { name: string; seats: number; }
    let keys: keyof OnlyPrimitives<Car>;  //  "name" | "seats"
    
    type KeysOfPrimitives<T> = keyof OnlyPrimitives<T>;
    
    let carKeys: KeysOfPrimitives<Car>;  // "name" | "seats"
    
    // Repro from #41453
    
    type Equal<A, B> = (<T>() => T extends A ? 1 : 2) extends (<T>() => T extends B ? 1 : 2) ? true : false;
    
    type If<Cond extends boolean, Then, Else> = Cond extends true ? Then : Else;
    
    type GetKey<S, V> = keyof { [TP in keyof S as Equal<S[TP], V> extends true ? TP : never]: any };
    
    type GetKeyWithIf<S, V> = keyof { [TP in keyof S as If<Equal<S[TP], V>, TP, never>]: any };
    
    type GetObjWithIf<S, V> = { [TP in keyof S as If<Equal<S[TP], V>, TP, never>]: any };
    
    type Task = {
      isDone: boolean;
    };
    
    type Schema = {
      root: {
        title: string;
        task: Task;
      }
      Task: Task;
    };
    
    type Res1 = GetKey<Schema, Schema['root']['task']>;  // "Task"
    type Res2 = GetKeyWithIf<Schema, Schema['root']['task']>;  // "Task"
    type Res3 = keyof GetObjWithIf<Schema, Schema['root']['task']>;  // "Task"
    
    // Repro from #44019
    
    type KeysExtendedBy<T, U> = keyof { [K in keyof T as U extends T[K] ? K : never] : T[K] };
    
    interface M {
        a: boolean;
        b: number;
    }
    
    function f(x: KeysExtendedBy<M, number>) {
        return x;
    }
    
    f("a");  // Error, should allow only "b"
      ~~~
!!! error TS2345: Argument of type '"a"' is not assignable to parameter of type '"b"'.
    
    type NameMap = { 'a': 'x', 'b': 'y', 'c': 'z' };
    
    // Distributive, will be simplified
    
    type TS0<T> = keyof { [P in keyof T as keyof Record<P, number>]: string };
    type TS1<T> = keyof { [P in keyof T as Extract<P, 'a' | 'b' | 'c'>]: string };
    type TS2<T> = keyof { [P in keyof T as P & ('a' | 'b' | 'c')]: string };
    type TS3<T> = keyof { [P in keyof T as Exclude<P, 'a' | 'b' | 'c'>]: string };
    type TS4<T> = keyof { [P in keyof T as NameMap[P & keyof NameMap]]: string };
    type TS5<T> = keyof { [P in keyof T & keyof NameMap as NameMap[P]]: string };
    type TS6<T, U, V> = keyof { [ K in keyof T as V & (K extends U ? K : never)]: string };
    
    // Non-distributive, won't be simplified
    
    type TN0<T> = keyof { [P in keyof T as T[P] extends number ? P : never]: string };
    type TN1<T> = keyof { [P in keyof T as number extends T[P] ? P : never]: string };
    type TN2<T> = keyof { [P in keyof T as 'a' extends P ? 'x' : 'y']: string };
    type TN3<T> = keyof { [P in keyof T as Exclude<Exclude<Exclude<P, 'c'>, 'b'>, 'a'>]: string };
    type TN4<T, U> = keyof { [K in keyof T as (K extends U ? T[K] : never) extends T[K] ? K : never]: string };
    type TN5<T, U> = keyof { [K in keyof T as keyof { [P in K as T[P] extends U ? K : never]: true }]: string };