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=== tests/cases/compiler/mappedTypeGenericIndexedAccess.ts ===
// Repro from #49242
type Types = {
>Types : { first: { a1: true;}; second: { a2: true;}; third: { a3: true;}; }
first: { a1: true };
>first : { a1: true; }
>a1 : true
>true : true
second: { a2: true };
>second : { a2: true; }
>a2 : true
>true : true
third: { a3: true };
>third : { a3: true; }
>a3 : true
>true : true
}
class Test {
>Test : Test
entries: { [T in keyof Types]?: Types[T][] };
>entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
constructor() {
this.entries = {};
>this.entries = {} : {}
>this.entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>this : this
>entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>{} : {}
}
addEntry<T extends keyof Types>(name: T, entry: Types[T]) {
>addEntry : <T extends keyof Types>(name: T, entry: Types[T]) => void
>name : T
>entry : Types[T]
if (!this.entries[name]) {
>!this.entries[name] : boolean
>this.entries[name] : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }[T]
>this.entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>this : this
>entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>name : T
this.entries[name] = [];
>this.entries[name] = [] : never[]
>this.entries[name] : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }[T]
>this.entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>this : this
>entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>name : T
>[] : never[]
}
this.entries[name]?.push(entry);
>this.entries[name]?.push(entry) : number | undefined
>this.entries[name]?.push : ((...items: Types[T][]) => number) | undefined
>this.entries[name] : Types[T][] | undefined
>this.entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>this : this
>entries : { first?: { a1: true; }[] | undefined; second?: { a2: true; }[] | undefined; third?: { a3: true; }[] | undefined; }
>name : T
>push : ((...items: Types[T][]) => number) | undefined
>entry : Types[T]
}
}
// Repro from #49338
type TypesMap = {
>TypesMap : { 0: { foo: 'bar';}; 1: { a: 'b';}; }
[0]: { foo: 'bar'; };
>[0] : { foo: 'bar'; }
>0 : 0
>foo : "bar"
[1]: { a: 'b'; };
>[1] : { a: 'b'; }
>1 : 1
>a : "b"
};
type P<T extends keyof TypesMap> = { t: T; } & TypesMap[T];
>P : P<T>
>t : T
type TypeHandlers = {
>TypeHandlers : { 0?: ((p: P<0>) => void) | undefined; 1?: ((p: P<1>) => void) | undefined; }
[T in keyof TypesMap]?: (p: P<T>) => void;
>p : P<T>
};
const typeHandlers: TypeHandlers = {
>typeHandlers : TypeHandlers
>{ [0]: (p) => console.log(p.foo), [1]: (p) => console.log(p.a),} : { 0: (p: P<0>) => void; 1: (p: P<1>) => void; }
[0]: (p) => console.log(p.foo),
>[0] : (p: P<0>) => void
>0 : 0
>(p) => console.log(p.foo) : (p: P<0>) => void
>p : P<0>
>console.log(p.foo) : void
>console.log : (...data: any[]) => void
>console : Console
>log : (...data: any[]) => void
>p.foo : "bar"
>p : P<0>
>foo : "bar"
[1]: (p) => console.log(p.a),
>[1] : (p: P<1>) => void
>1 : 1
>(p) => console.log(p.a) : (p: P<1>) => void
>p : P<1>
>console.log(p.a) : void
>console.log : (...data: any[]) => void
>console : Console
>log : (...data: any[]) => void
>p.a : "b"
>p : P<1>
>a : "b"
};
const onSomeEvent = <T extends keyof TypesMap>(p: P<T>) =>
>onSomeEvent : <T extends keyof TypesMap>(p: P<T>) => void | undefined
><T extends keyof TypesMap>(p: P<T>) => typeHandlers[p.t]?.(p) : <T extends keyof TypesMap>(p: P<T>) => void | undefined
>p : P<T>
typeHandlers[p.t]?.(p);
>typeHandlers[p.t]?.(p) : void | undefined
>typeHandlers[p.t] : ((p: P<T>) => void) | undefined
>typeHandlers : TypeHandlers
>p.t : T
>p : { t: T; } & ({ foo: "bar"; } | { a: "b"; })
>t : T
>p : P<T>
|
