8d5c197f99
* Loosen check in getIndexTypeForMappedType to directly map property names when any indexy type is present * Handle homomorphic mappings better in keyof, add specific relationship rule for relating generic keyof MappedType to handle remapped keys * Remove trailing whitespace
304 lines
8 KiB
Plaintext
304 lines
8 KiB
Plaintext
=== tests/cases/conformance/types/mapped/mappedTypeAsClauses.ts ===
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// Mapped type 'as N' clauses
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type Getters<T> = { [P in keyof T & string as `get${Capitalize<P>}`]: () => T[P] };
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>Getters : Getters<T>
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type TG1 = Getters<{ foo: string, bar: number, baz: { z: boolean } }>;
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>TG1 : TG1
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>foo : string
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>bar : number
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>baz : { z: boolean; }
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>z : boolean
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// Mapped type with 'as N' clause has no constraint on 'in T' clause
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type PropDef<K extends keyof any, T> = { name: K, type: T };
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>PropDef : PropDef<K, T>
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>name : K
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>type : T
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type TypeFromDefs<T extends PropDef<keyof any, any>> = { [P in T as P['name']]: P['type'] };
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>TypeFromDefs : TypeFromDefs<T>
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type TP1 = TypeFromDefs<{ name: 'a', type: string } | { name: 'b', type: number } | { name: 'a', type: boolean }>;
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>TP1 : TP1
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>name : "a"
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>type : string
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>name : "b"
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>type : number
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>name : "a"
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>type : boolean
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// No array or tuple type mapping when 'as N' clause present
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type TA1 = Getters<string[]>;
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>TA1 : TA1
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type TA2 = Getters<[number, boolean]>;
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>TA2 : TA2
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// Filtering using 'as N' clause
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type Methods<T> = { [P in keyof T as T[P] extends Function ? P : never]: T[P] };
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>Methods : Methods<T>
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type TM1 = Methods<{ foo(): number, bar(x: string): boolean, baz: string | number }>;
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>TM1 : Methods<{ foo(): number; bar(x: string): boolean; baz: string | number; }>
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>foo : () => number
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>bar : (x: string) => boolean
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>x : string
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>baz : string | number
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// Mapping to multiple names using 'as N' clause
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type DoubleProp<T> = { [P in keyof T & string as `${P}1` | `${P}2`]: T[P] }
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>DoubleProp : DoubleProp<T>
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type TD1 = DoubleProp<{ a: string, b: number }>; // { a1: string, a2: string, b1: number, b2: number }
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>TD1 : TD1
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>a : string
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>b : number
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type TD2 = keyof TD1; // 'a1' | 'a2' | 'b1' | 'b2'
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>TD2 : "a1" | "a2" | "b1" | "b2"
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type TD3<U> = keyof DoubleProp<U>; // `${keyof U & string}1` | `${keyof U & string}2`
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>TD3 : `${keyof U & string}1` | `${keyof U & string}2`
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// Repro from #40619
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type Lazyify<T> = {
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>Lazyify : Lazyify<T>
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[K in keyof T as `get${Capitalize<K & string>}`]: () => T[K]
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};
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interface Person {
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readonly name: string;
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>name : string
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age: number;
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>age : number
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location?: string;
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>location : string | undefined
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}
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type LazyPerson = Lazyify<Person>;
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>LazyPerson : Lazyify<Person>
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// Repro from #40833
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type Example = {foo: string, bar: number};
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>Example : Example
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>foo : string
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>bar : number
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type PickByValueType<T, U> = {
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>PickByValueType : PickByValueType<T, U>
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[K in keyof T as T[K] extends U ? K : never]: T[K]
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};
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type T1 = PickByValueType<Example, string>;
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>T1 : PickByValueType<Example, string>
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const e1: T1 = {
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>e1 : PickByValueType<Example, string>
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>{ foo: "hello"} : { foo: string; }
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foo: "hello"
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>foo : string
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>"hello" : "hello"
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};
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type T2 = keyof T1;
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>T2 : "foo"
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const e2: T2 = "foo";
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>e2 : "foo"
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>"foo" : "foo"
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// Repro from #41133
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interface Car {
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name: string;
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>name : string
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seats: number;
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>seats : number
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engine: Engine;
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>engine : Engine
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wheels: Wheel[];
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>wheels : Wheel[]
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}
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interface Engine {
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manufacturer: string;
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>manufacturer : string
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horsepower: number;
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>horsepower : number
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}
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interface Wheel {
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type: "summer" | "winter";
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>type : "summer" | "winter"
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radius: number;
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>radius : number
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}
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type Primitive = string | number | boolean;
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>Primitive : Primitive
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type OnlyPrimitives<T> = { [K in keyof T as T[K] extends Primitive ? K : never]: T[K] };
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>OnlyPrimitives : OnlyPrimitives<T>
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let primitiveCar: OnlyPrimitives<Car>; // { name: string; seats: number; }
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>primitiveCar : OnlyPrimitives<Car>
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let keys: keyof OnlyPrimitives<Car>; // "name" | "seats"
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>keys : "name" | "seats"
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type KeysOfPrimitives<T> = keyof OnlyPrimitives<T>;
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>KeysOfPrimitives : keyof OnlyPrimitives<T>
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let carKeys: KeysOfPrimitives<Car>; // "name" | "seats"
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>carKeys : "name" | "seats"
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// Repro from #41453
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type Equal<A, B> = (<T>() => T extends A ? 1 : 2) extends (<T>() => T extends B ? 1 : 2) ? true : false;
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>Equal : Equal<A, B>
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>true : true
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>false : false
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type If<Cond extends boolean, Then, Else> = Cond extends true ? Then : Else;
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>If : If<Cond, Then, Else>
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>true : true
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type GetKey<S, V> = keyof { [TP in keyof S as Equal<S[TP], V> extends true ? TP : never]: any };
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>GetKey : keyof { [TP in keyof S as Equal<S[TP], V> extends true ? TP : never]: any; }
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>true : true
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type GetKeyWithIf<S, V> = keyof { [TP in keyof S as If<Equal<S[TP], V>, TP, never>]: any };
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>GetKeyWithIf : keyof { [TP in keyof S as If<Equal<S[TP], V>, TP, never>]: any; }
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type GetObjWithIf<S, V> = { [TP in keyof S as If<Equal<S[TP], V>, TP, never>]: any };
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>GetObjWithIf : GetObjWithIf<S, V>
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type Task = {
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>Task : Task
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isDone: boolean;
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>isDone : boolean
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};
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type Schema = {
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>Schema : Schema
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root: {
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>root : { title: string; task: Task; }
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title: string;
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>title : string
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task: Task;
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>task : Task
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}
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Task: Task;
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>Task : Task
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};
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type Res1 = GetKey<Schema, Schema['root']['task']>; // "Task"
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>Res1 : "Task"
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type Res2 = GetKeyWithIf<Schema, Schema['root']['task']>; // "Task"
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>Res2 : "Task"
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type Res3 = keyof GetObjWithIf<Schema, Schema['root']['task']>; // "Task"
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>Res3 : "Task"
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// Repro from #44019
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type KeysExtendedBy<T, U> = keyof { [K in keyof T as U extends T[K] ? K : never] : T[K] };
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>KeysExtendedBy : keyof { [K in keyof T as U extends T[K] ? K : never]: T[K]; }
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interface M {
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a: boolean;
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>a : boolean
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b: number;
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>b : number
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}
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function f(x: KeysExtendedBy<M, number>) {
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>f : (x: KeysExtendedBy<M, number>) => "b"
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>x : "b"
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return x;
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>x : "b"
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}
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f("a"); // Error, should allow only "b"
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>f("a") : "b"
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>f : (x: "b") => "b"
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>"a" : "a"
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type NameMap = { 'a': 'x', 'b': 'y', 'c': 'z' };
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>NameMap : NameMap
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>'a' : "x"
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>'b' : "y"
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>'c' : "z"
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// Distributive, will be simplified
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type TS0<T> = keyof { [P in keyof T as keyof Record<P, number>]: string };
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>TS0 : keyof { [P in keyof T as P]: string; }
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type TS1<T> = keyof { [P in keyof T as Extract<P, 'a' | 'b' | 'c'>]: string };
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>TS1 : keyof { [P in keyof T as Extract<P, "a" | "b" | "c">]: string; }
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type TS2<T> = keyof { [P in keyof T as P & ('a' | 'b' | 'c')]: string };
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>TS2 : keyof { [P in keyof T as P & ("a" | "b" | "c")]: string; }
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type TS3<T> = keyof { [P in keyof T as Exclude<P, 'a' | 'b' | 'c'>]: string };
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>TS3 : keyof { [P in keyof T as Exclude<P, "a" | "b" | "c">]: string; }
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type TS4<T> = keyof { [P in keyof T as NameMap[P & keyof NameMap]]: string };
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>TS4 : keyof { [P in keyof T as NameMap[P & keyof NameMap]]: string; }
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type TS5<T> = keyof { [P in keyof T & keyof NameMap as NameMap[P]]: string };
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>TS5 : NameMap[keyof T & "a"] | NameMap[keyof T & "b"] | NameMap[keyof T & "c"]
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type TS6<T, U, V> = keyof { [ K in keyof T as V & (K extends U ? K : never)]: string };
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>TS6 : keyof { [K in keyof T as V & (K extends U ? K : never)]: string; }
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// Non-distributive, won't be simplified
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type TN0<T> = keyof { [P in keyof T as T[P] extends number ? P : never]: string };
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>TN0 : keyof { [P in keyof T as T[P] extends number ? P : never]: string; }
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type TN1<T> = keyof { [P in keyof T as number extends T[P] ? P : never]: string };
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>TN1 : keyof { [P in keyof T as number extends T[P] ? P : never]: string; }
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type TN2<T> = keyof { [P in keyof T as 'a' extends P ? 'x' : 'y']: string };
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>TN2 : keyof { [P in keyof T as "a" extends P ? "x" : "y"]: string; }
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type TN3<T> = keyof { [P in keyof T as Exclude<Exclude<Exclude<P, 'c'>, 'b'>, 'a'>]: string };
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>TN3 : keyof { [P in keyof T as Exclude<Exclude<Exclude<P, "c">, "b">, "a">]: string; }
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type TN4<T, U> = keyof { [K in keyof T as (K extends U ? T[K] : never) extends T[K] ? K : never]: string };
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>TN4 : keyof { [K in keyof T as (K extends U ? T[K] : never) extends T[K] ? K : never]: string; }
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type TN5<T, U> = keyof { [K in keyof T as keyof { [P in K as T[P] extends U ? K : never]: true }]: string };
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>TN5 : keyof { [K in keyof T as keyof { [P in K as T[P] extends U ? K : never]: true; }]: string; }
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>true : true
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