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tests/cases/compiler/constraintWithIndexedAccess.ts(28,102): error TS2344: Type 'DataFetchFns[T][T]' does not satisfy the constraint '(...args: any) => any'.
Type 'DataFetchFns[T]["Boat"] | DataFetchFns[T]["Plane"]' is not assignable to type '(...args: any) => any'.
Type 'DataFetchFns[T]["Boat"]' is not assignable to type '(...args: any) => any'.
tests/cases/compiler/constraintWithIndexedAccess.ts(28,102): error TS2536: Type 'T' cannot be used to index type 'DataFetchFns[T]'.
tests/cases/compiler/constraintWithIndexedAccess.ts(29,102): error TS2536: Type 'F' cannot be used to index type 'DataFetchFns'.
tests/cases/compiler/constraintWithIndexedAccess.ts(29,102): error TS2344: Type 'DataFetchFns[F][F]' does not satisfy the constraint '(...args: any) => any'.
Type 'DataFetchFns[F][keyof DataFetchFns[T]]' is not assignable to type '(...args: any) => any'.
Type 'DataFetchFns[F][string] | DataFetchFns[F][number] | DataFetchFns[F][symbol]' is not assignable to type '(...args: any) => any'.
Type 'DataFetchFns[F][string]' is not assignable to type '(...args: any) => any'.
Type 'DataFetchFns[keyof DataFetchFns[T]][string]' is not assignable to type '(...args: any) => any'.
tests/cases/compiler/constraintWithIndexedAccess.ts(29,102): error TS2536: Type 'F' cannot be used to index type 'DataFetchFns[F]'.
==== tests/cases/compiler/constraintWithIndexedAccess.ts (5 errors) ====
// #52399
type DataFetchFns = {
Boat: {
requiresLicense: (id: string) => boolean;
maxGroundSpeed: (id: string) => number;
description: (id: string) => string;
displacement: (id: string) => number;
name: (id: string) => string;
};
Plane: {
requiresLicense: (id: string) => boolean;
maxGroundSpeed: (id: string) => number;
maxTakeoffWeight: (id: string) => number;
maxCruisingAltitude: (id: string) => number;
name: (id: string) => string;
}
}
export type NoTypeParamBoatRequired<F extends keyof DataFetchFns['Boat']> = ReturnType<DataFetchFns['Boat'][F]>;
type TypeHardcodedAsParameterWithoutReturnType<T extends 'Boat', F extends keyof DataFetchFns[T]> = DataFetchFns[T][F];
export type allAreFunctionsAsExpected = TypeHardcodedAsParameterWithoutReturnType<'Boat', keyof DataFetchFns['Boat']>;
export type returnTypeOfFunctions = ReturnType<allAreFunctionsAsExpected>; //string | number | boolean as expected
export type SucceedingCombo = ReturnType<TypeHardcodedAsParameterWithoutReturnType<'Boat', keyof DataFetchFns['Boat']>>;
export type FailingCombo<T extends 'Boat', F extends keyof DataFetchFns[T]> = ReturnType<TypeHardcodedAsParameterWithoutReturnType<T,F>>;
export type TypeHardcodedAsParameter<T extends 'Boat', F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[T][F]>;
type VehicleSelector<T extends keyof DataFetchFns> = DataFetchFns[T];
export type TypeHardcodedAsParameter2<T extends 'Boat', F extends keyof DataFetchFns[T]> = ReturnType<VehicleSelector<T>[F]>;
export type TypeGeneric1<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[T][F]>;
export type TypeGeneric2<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[T][T]>; // error
~~~~~~~~~~~~~~~~~~
!!! error TS2344: Type 'DataFetchFns[T][T]' does not satisfy the constraint '(...args: any) => any'.
!!! error TS2344: Type 'DataFetchFns[T]["Boat"] | DataFetchFns[T]["Plane"]' is not assignable to type '(...args: any) => any'.
!!! error TS2344: Type 'DataFetchFns[T]["Boat"]' is not assignable to type '(...args: any) => any'.
~~~~~~~~~~~~~~~~~~
!!! error TS2536: Type 'T' cannot be used to index type 'DataFetchFns[T]'.
export type TypeGeneric3<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[F][F]>; // error
~~~~~~~~~~~~~~~
!!! error TS2536: Type 'F' cannot be used to index type 'DataFetchFns'.
~~~~~~~~~~~~~~~~~~
!!! error TS2344: Type 'DataFetchFns[F][F]' does not satisfy the constraint '(...args: any) => any'.
!!! error TS2344: Type 'DataFetchFns[F][keyof DataFetchFns[T]]' is not assignable to type '(...args: any) => any'.
!!! error TS2344: Type 'DataFetchFns[F][string] | DataFetchFns[F][number] | DataFetchFns[F][symbol]' is not assignable to type '(...args: any) => any'.
!!! error TS2344: Type 'DataFetchFns[F][string]' is not assignable to type '(...args: any) => any'.
!!! error TS2344: Type 'DataFetchFns[keyof DataFetchFns[T]][string]' is not assignable to type '(...args: any) => any'.
~~~~~~~~~~~~~~~~~~
!!! error TS2536: Type 'F' cannot be used to index type 'DataFetchFns[F]'.
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