keyofAndIndexedAccess2.types

=== tests/cases/conformance/types/keyof/keyofAndIndexedAccess2.ts ===
function f1(obj: { a: number, b: 0 | 1, c: string }, k0: 'a', k1: 'a' | 'b', k2: 'a' | 'b' | 'c') {
>f1 : (obj: { a: number; b: 0 | 1; c: string; }, k0: "a", k1: "a" | "b", k2: "a" | "b" | "c") => void
>obj : { a: number; b: 0 | 1; c: string; }
>a : number
>b : 0 | 1
>c : string
>k0 : "a"
>k1 : "a" | "b"
>k2 : "a" | "b" | "c"

    obj[k0] = 1;
>obj[k0] = 1 : 1
>obj[k0] : number
>obj : { a: number; b: 0 | 1; c: string; }
>k0 : "a"
>1 : 1

    obj[k0] = 2;
>obj[k0] = 2 : 2
>obj[k0] : number
>obj : { a: number; b: 0 | 1; c: string; }
>k0 : "a"
>2 : 2

    obj[k0] = 'x';  // Error
>obj[k0] = 'x' : "x"
>obj[k0] : number
>obj : { a: number; b: 0 | 1; c: string; }
>k0 : "a"
>'x' : "x"

    obj[k1] = 1;
>obj[k1] = 1 : 1
>obj[k1] : 0 | 1
>obj : { a: number; b: 0 | 1; c: string; }
>k1 : "a" | "b"
>1 : 1

    obj[k1] = 2;    // Error
>obj[k1] = 2 : 2
>obj[k1] : 0 | 1
>obj : { a: number; b: 0 | 1; c: string; }
>k1 : "a" | "b"
>2 : 2

    obj[k1] = 'x';  // Error
>obj[k1] = 'x' : "x"
>obj[k1] : 0 | 1
>obj : { a: number; b: 0 | 1; c: string; }
>k1 : "a" | "b"
>'x' : "x"

    obj[k2] = 1;    // Error
>obj[k2] = 1 : 1
>obj[k2] : never
>obj : { a: number; b: 0 | 1; c: string; }
>k2 : "a" | "b" | "c"
>1 : 1

    obj[k2] = 2;    // Error
>obj[k2] = 2 : 2
>obj[k2] : never
>obj : { a: number; b: 0 | 1; c: string; }
>k2 : "a" | "b" | "c"
>2 : 2

    obj[k2] = 'x';  // Error
>obj[k2] = 'x' : "x"
>obj[k2] : never
>obj : { a: number; b: 0 | 1; c: string; }
>k2 : "a" | "b" | "c"
>'x' : "x"
}

function f2<T extends { [key: string]: number }>(a: { x: number, y: number }, b: { [key: string]: number }, c: T, k: keyof T) {
>f2 : <T extends { [key: string]: number; }>(a: { x: number; y: number; }, b: { [key: string]: number; }, c: T, k: keyof T) => void
>key : string
>a : { x: number; y: number; }
>x : number
>y : number
>b : { [key: string]: number; }
>key : string
>c : T
>k : keyof T

    a = b;  // Error, index signature in source doesn't imply properties are present
>a = b : { [key: string]: number; }
>a : { x: number; y: number; }
>b : { [key: string]: number; }

    a = c;  // Error, index signature in source doesn't imply properties are present
>a = c : T
>a : { x: number; y: number; }
>c : T

    b = a;
>b = a : { x: number; y: number; }
>b : { [key: string]: number; }
>a : { x: number; y: number; }

    b = c;
>b = c : T
>b : { [key: string]: number; }
>c : T

    c = a;  // Error, constraint on target doesn't imply any properties or signatures
>c = a : { x: number; y: number; }
>c : T
>a : { x: number; y: number; }

    c = b;  // Error, constraint on target doesn't imply any properties or signatures
>c = b : { [key: string]: number; }
>c : T
>b : { [key: string]: number; }

    a.x;
>a.x : number
>a : { x: number; y: number; }
>x : number

    b.x;
>b.x : number
>b : { [key: string]: number; }
>x : number

    c.x;
>c.x : number
>c : T
>x : number

    c[k];
>c[k] : T[keyof T]
>c : T
>k : keyof T

    a.x = 1;
>a.x = 1 : 1
>a.x : number
>a : { x: number; y: number; }
>x : number
>1 : 1

    b.x = 1;
>b.x = 1 : 1
>b.x : number
>b : { [key: string]: number; }
>x : number
>1 : 1

    c.x = 1;  // Error, cannot write to index signature through constraint
>c.x = 1 : 1
>c.x : any
>c : T
>x : any
>1 : 1

    c[k] = 1; // Error, cannot write to index signature through constraint
>c[k] = 1 : 1
>c[k] : T[keyof T]
>c : T
>k : keyof T
>1 : 1
}

function f3<K extends string>(a: { [P in K]: number }, b: { [key: string]: number }, k: K) {
>f3 : <K extends string>(a: { [P in K]: number; }, b: { [key: string]: number; }, k: K) => void
>a : { [P in K]: number; }
>b : { [key: string]: number; }
>key : string
>k : K

    a = b;  // Error, index signature doesn't imply properties are present
>a = b : { [key: string]: number; }
>a : { [P in K]: number; }
>b : { [key: string]: number; }

    b = a;
>b = a : { [P in K]: number; }
>b : { [key: string]: number; }
>a : { [P in K]: number; }

    a[k];
>a[k] : { [P in K]: number; }[K]
>a : { [P in K]: number; }
>k : K

    a[k] = 1;
>a[k] = 1 : 1
>a[k] : { [P in K]: number; }[K]
>a : { [P in K]: number; }
>k : K
>1 : 1
}

function f3b<K extends string>(a: { [P in K]: number }, b: { [P in string]: number }, k: K) {
>f3b : <K extends string>(a: { [P in K]: number; }, b: { [x: string]: number; }, k: K) => void
>a : { [P in K]: number; }
>b : { [x: string]: number; }
>k : K

    a = b;  // Error, index signature doesn't imply properties are present
>a = b : { [x: string]: number; }
>a : { [P in K]: number; }
>b : { [x: string]: number; }

    b = a;
>b = a : { [P in K]: number; }
>b : { [x: string]: number; }
>a : { [P in K]: number; }
}

function f4<K extends string>(a: { [key: string]: number }[K], b: number) {
>f4 : <K extends string>(a: number, b: number) => void
>a : number
>key : string
>b : number

  a = b;
>a = b : number
>a : number
>b : number

  b = a;
>b = a : number
>b : number
>a : number
}

type Item = { a: string, b: number };
>Item : Item
>a : string
>b : number

function f10<T extends Item, K extends keyof T>(obj: T, k1: string, k2: keyof Item, k3: keyof T, k4: K) {
>f10 : <T extends Item, K extends keyof T>(obj: T, k1: string, k2: "a" | "b", k3: keyof T, k4: K) => void
>obj : T
>k1 : string
>k2 : "a" | "b"
>k3 : keyof T
>k4 : K

  obj[k1] = 123;  // Error
>obj[k1] = 123 : 123
>obj[k1] : any
>obj : T
>k1 : string
>123 : 123

  obj[k2] = 123;  // Error
>obj[k2] = 123 : 123
>obj[k2] : string & number
>obj : T
>k2 : "a" | "b"
>123 : 123

  obj[k3] = 123;  // Error
>obj[k3] = 123 : 123
>obj[k3] : T[keyof T]
>obj : T
>k3 : keyof T
>123 : 123

  obj[k4] = 123;  // Error
>obj[k4] = 123 : 123
>obj[k4] : T[K]
>obj : T
>k4 : K
>123 : 123
}

type Dict = Record<string, number>;
>Dict : Record<string, number>

function f11<K extends keyof Dict>(obj: Dict, k1: keyof Dict, k2: K) {
>f11 : <K extends string>(obj: Record<string, number>, k1: string, k2: K) => void
>obj : Record<string, number>
>k1 : string
>k2 : K

  obj.foo = 123;
>obj.foo = 123 : 123
>obj.foo : number
>obj : Record<string, number>
>foo : number
>123 : 123

  obj[k1] = 123;
>obj[k1] = 123 : 123
>obj[k1] : number
>obj : Record<string, number>
>k1 : string
>123 : 123

  obj[k2] = 123;
>obj[k2] = 123 : 123
>obj[k2] : number
>obj : Record<string, number>
>k2 : K
>123 : 123
}

function f12<T extends Readonly<Dict>, K extends keyof T>(obj: T, k1: keyof Dict, k2: keyof T, k3: K) {
>f12 : <T extends Readonly<Record<string, number>>, K extends keyof T>(obj: T, k1: string, k2: keyof T, k3: K) => void
>obj : T
>k1 : string
>k2 : keyof T
>k3 : K

  obj.foo = 123;  // Error
>obj.foo = 123 : 123
>obj.foo : any
>obj : T
>foo : any
>123 : 123

  obj[k1] = 123;  // Error
>obj[k1] = 123 : 123
>obj[k1] : any
>obj : T
>k1 : string
>123 : 123

  obj[k2] = 123;  // Error
>obj[k2] = 123 : 123
>obj[k2] : T[keyof T]
>obj : T
>k2 : keyof T
>123 : 123

  obj[k3] = 123;  // Error
>obj[k3] = 123 : 123
>obj[k3] : T[K]
>obj : T
>k3 : K
>123 : 123
}

// Repro from #27895

export interface Entity {
    id: number | string;
>id : string | number
}

export type IdOf<E extends Entity> = E['id'];
>IdOf : E["id"]

export interface EntityState<E extends Entity> {
    ids: IdOf<E>[];
>ids : E["id"][]

    entities: { [key: string]: E, [key: number]: E };
>entities : { [key: string]: E; [key: number]: E; }
>key : string
>key : number
}


export function getAllEntities<E extends Entity>(state: EntityState<E>): E[] {
>getAllEntities : <E extends Entity>(state: EntityState<E>) => E[]
>state : EntityState<E>

    const { ids, entities } = state;
>ids : E["id"][]
>entities : { [key: string]: E; [key: number]: E; }
>state : EntityState<E>

    return ids.map(id => entities[id]);
>ids.map(id => entities[id]) : { [key: string]: E; [key: number]: E; }[E["id"]][]
>ids.map : <U>(callbackfn: (value: E["id"], index: number, array: E["id"][]) => U, thisArg?: any) => U[]
>ids : E["id"][]
>map : <U>(callbackfn: (value: E["id"], index: number, array: E["id"][]) => U, thisArg?: any) => U[]
>id => entities[id] : (id: E["id"]) => { [key: string]: E; [key: number]: E; }[E["id"]]
>id : E["id"]
>entities[id] : { [key: string]: E; [key: number]: E; }[E["id"]]
>entities : { [key: string]: E; [key: number]: E; }
>id : E["id"]
}

export function getEntity<E extends Entity>(id: IdOf<E>, state: EntityState<E>): E | undefined {
>getEntity : <E extends Entity>(id: E["id"], state: EntityState<E>) => E | undefined
>id : E["id"]
>state : EntityState<E>

    const { ids, entities } = state;
>ids : E["id"][]
>entities : { [key: string]: E; [key: number]: E; }
>state : EntityState<E>

    if (!ids.includes(id)) {
>!ids.includes(id) : boolean
>ids.includes(id) : boolean
>ids.includes : (searchElement: E["id"], fromIndex?: number | undefined) => boolean
>ids : E["id"][]
>includes : (searchElement: E["id"], fromIndex?: number | undefined) => boolean
>id : E["id"]

        return undefined;
>undefined : undefined
    }

    return entities[id];
>entities[id] : { [key: string]: E; [key: number]: E; }[E["id"]]
>entities : { [key: string]: E; [key: number]: E; }
>id : E["id"]
}

// Repro from #30603

interface Type {
    a: 123;
>a : 123

    b: "some string";
>b : "some string"
}

function get123<K extends keyof Type>(): Type[K] {
>get123 : <K extends "a" | "b">() => Type[K]

    return 123;  // Error
>123 : 123
}

// Repro from #30920

type StrictExtract<T, U> = T extends U ? U extends T ? T : never : never;
>StrictExtract : StrictExtract<T, U>

type StrictExclude<T, U> = T extends StrictExtract<T, U> ? never : T;
>StrictExclude : StrictExclude<T, U>

type A<T> = { [Q in { [P in keyof T]: P; }[keyof T]]: T[Q]; };
>A : A<T>

type B<T, V> = A<{ [Q in keyof T]: StrictExclude<B<T[Q], V>, {}>; }>;
>B : A<{ [Q in keyof T]: StrictExclude<A<{ [Q in keyof T[Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q][Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q][Q][Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q][Q][Q][Q][Q][Q]]: StrictExclude<A<{ [Q in keyof T[Q][Q][Q][Q][Q][Q][Q][Q][Q][Q]]: StrictExclude<A<any>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>, {}>; }>

// Repros from #30938

function fn<T extends {elements: Array<string>} | {elements: Array<number>}>(param: T, cb: (element: T['elements'][number]) => void) {
>fn : <T extends { elements: string[]; } | { elements: number[]; }>(param: T, cb: (element: T["elements"][number]) => void) => void
>elements : string[]
>elements : number[]
>param : T
>cb : (element: T["elements"][number]) => void
>element : T["elements"][number]

    cb(param.elements[0]);
>cb(param.elements[0]) : void
>cb : (element: T["elements"][number]) => void
>param.elements[0] : string | number
>param.elements : string[] | number[]
>param : T
>elements : string[] | number[]
>0 : 0
}

function fn2<T extends Array<string>>(param: T, cb: (element: T[number]) => void) {
>fn2 : <T extends string[]>(param: T, cb: (element: T[number]) => void) => void
>param : T
>cb : (element: T[number]) => void
>element : T[number]

    cb(param[0]);
>cb(param[0]) : void
>cb : (element: T[number]) => void
>param[0] : string
>param : T
>0 : 0
}

// Repro from #31149

function fn3<T extends ReadonlyArray<string>>(param: T, cb: (element: T[number]) => void) {
>fn3 : <T extends readonly string[]>(param: T, cb: (element: T[number]) => void) => void
>param : T
>cb : (element: T[number]) => void
>element : T[number]

    cb(param[0]); // Argument of type 'string' is not assignable to parameter of type 'T[number]'.
>cb(param[0]) : void
>cb : (element: T[number]) => void
>param[0] : string
>param : T
>0 : 0
}