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Mar 21, 2023
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Accurate constraintType for indexedAccessType #53059

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0f6bc92
Accurate constraintType for indexedAccessType
islandryu Feb 23, 2023
3df8c50
Changed processing for IndexAccess to be done in sourceFlags & TypeFl…
islandryu Mar 18, 2023
845f5ab
Minor corrections
islandryu Mar 18, 2023
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11 changes: 11 additions & 0 deletions src/compiler/checker.ts
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Expand Up @@ -21466,6 +21466,17 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
else if (result = isRelatedTo(getTypeWithThisArgument(constraint, source), target, RecursionFlags.Source, reportErrors && constraint !== unknownType && !(targetFlags & sourceFlags & TypeFlags.TypeParameter), /*headMessage*/ undefined, intersectionState)) {
return result;
}
if (sourceFlags & TypeFlags.IndexedAccess) {
const indexType = (source as IndexedAccessType).indexType;
if (indexType.flags & TypeFlags.Index) {
const unresolvedIndexConstraint = getBaseConstraintOfType((indexType as IndexType).type);
const indexConstraint = unresolvedIndexConstraint && unresolvedIndexConstraint !== noConstraintType ? getIndexType(unresolvedIndexConstraint) : keyofConstraintType;
const constraint = getIndexedAccessType((source as IndexedAccessType).objectType, indexConstraint);
if (result = isRelatedTo(constraint, target, RecursionFlags.Source, /*reportErrors*/ false, /*headMessage*/ undefined, intersectionState)) {
return result;
}
}
}
if (isMappedTypeGenericIndexedAccess(source)) {
// For an indexed access type { [P in K]: E}[X], above we have already explored an instantiation of E with X
// substituted for P. We also want to explore type { [P in K]: E }[C], where C is the constraint of X.
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60 changes: 60 additions & 0 deletions tests/baselines/reference/constraintWithIndexedAccess.errors.txt
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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]'.

35 changes: 35 additions & 0 deletions tests/baselines/reference/constraintWithIndexedAccess.js
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//// [constraintWithIndexedAccess.ts]
// #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
export type TypeGeneric3<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[F][F]>; // error


//// [constraintWithIndexedAccess.js]
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
163 changes: 163 additions & 0 deletions tests/baselines/reference/constraintWithIndexedAccess.symbols
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=== tests/cases/compiler/constraintWithIndexedAccess.ts ===
// #52399
type DataFetchFns = {
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))

Boat: {
>Boat : Symbol(Boat, Decl(constraintWithIndexedAccess.ts, 1, 21))

requiresLicense: (id: string) => boolean;
>requiresLicense : Symbol(requiresLicense, Decl(constraintWithIndexedAccess.ts, 2, 11))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 3, 26))

maxGroundSpeed: (id: string) => number;
>maxGroundSpeed : Symbol(maxGroundSpeed, Decl(constraintWithIndexedAccess.ts, 3, 49))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 4, 25))

description: (id: string) => string;
>description : Symbol(description, Decl(constraintWithIndexedAccess.ts, 4, 47))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 5, 22))

displacement: (id: string) => number;
>displacement : Symbol(displacement, Decl(constraintWithIndexedAccess.ts, 5, 44))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 6, 23))

name: (id: string) => string;
>name : Symbol(name, Decl(constraintWithIndexedAccess.ts, 6, 45))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 7, 15))

};
Plane: {
>Plane : Symbol(Plane, Decl(constraintWithIndexedAccess.ts, 8, 6))

requiresLicense: (id: string) => boolean;
>requiresLicense : Symbol(requiresLicense, Decl(constraintWithIndexedAccess.ts, 9, 12))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 10, 26))

maxGroundSpeed: (id: string) => number;
>maxGroundSpeed : Symbol(maxGroundSpeed, Decl(constraintWithIndexedAccess.ts, 10, 49))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 11, 25))

maxTakeoffWeight: (id: string) => number;
>maxTakeoffWeight : Symbol(maxTakeoffWeight, Decl(constraintWithIndexedAccess.ts, 11, 47))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 12, 27))

maxCruisingAltitude: (id: string) => number;
>maxCruisingAltitude : Symbol(maxCruisingAltitude, Decl(constraintWithIndexedAccess.ts, 12, 49))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 13, 30))

name: (id: string) => string;
>name : Symbol(name, Decl(constraintWithIndexedAccess.ts, 13, 52))
>id : Symbol(id, Decl(constraintWithIndexedAccess.ts, 14, 15))
}
}
export type NoTypeParamBoatRequired<F extends keyof DataFetchFns['Boat']> = ReturnType<DataFetchFns['Boat'][F]>;
>NoTypeParamBoatRequired : Symbol(NoTypeParamBoatRequired, Decl(constraintWithIndexedAccess.ts, 16, 1))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 17, 36))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 17, 36))

type TypeHardcodedAsParameterWithoutReturnType<T extends 'Boat', F extends keyof DataFetchFns[T]> = DataFetchFns[T][F];
>TypeHardcodedAsParameterWithoutReturnType : Symbol(TypeHardcodedAsParameterWithoutReturnType, Decl(constraintWithIndexedAccess.ts, 17, 112))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 18, 47))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 18, 64))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 18, 47))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 18, 47))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 18, 64))

export type allAreFunctionsAsExpected = TypeHardcodedAsParameterWithoutReturnType<'Boat', keyof DataFetchFns['Boat']>;
>allAreFunctionsAsExpected : Symbol(allAreFunctionsAsExpected, Decl(constraintWithIndexedAccess.ts, 18, 119))
>TypeHardcodedAsParameterWithoutReturnType : Symbol(TypeHardcodedAsParameterWithoutReturnType, Decl(constraintWithIndexedAccess.ts, 17, 112))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))

export type returnTypeOfFunctions = ReturnType<allAreFunctionsAsExpected>; //string | number | boolean as expected
>returnTypeOfFunctions : Symbol(returnTypeOfFunctions, Decl(constraintWithIndexedAccess.ts, 19, 118))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>allAreFunctionsAsExpected : Symbol(allAreFunctionsAsExpected, Decl(constraintWithIndexedAccess.ts, 18, 119))

export type SucceedingCombo = ReturnType<TypeHardcodedAsParameterWithoutReturnType<'Boat', keyof DataFetchFns['Boat']>>;
>SucceedingCombo : Symbol(SucceedingCombo, Decl(constraintWithIndexedAccess.ts, 20, 74))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>TypeHardcodedAsParameterWithoutReturnType : Symbol(TypeHardcodedAsParameterWithoutReturnType, Decl(constraintWithIndexedAccess.ts, 17, 112))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))

export type FailingCombo<T extends 'Boat', F extends keyof DataFetchFns[T]> = ReturnType<TypeHardcodedAsParameterWithoutReturnType<T,F>>;
>FailingCombo : Symbol(FailingCombo, Decl(constraintWithIndexedAccess.ts, 21, 120))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 22, 25))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 22, 42))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 22, 25))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>TypeHardcodedAsParameterWithoutReturnType : Symbol(TypeHardcodedAsParameterWithoutReturnType, Decl(constraintWithIndexedAccess.ts, 17, 112))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 22, 25))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 22, 42))

export type TypeHardcodedAsParameter<T extends 'Boat', F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[T][F]>;
>TypeHardcodedAsParameter : Symbol(TypeHardcodedAsParameter, Decl(constraintWithIndexedAccess.ts, 22, 137))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 23, 37))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 23, 54))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 23, 37))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 23, 37))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 23, 54))

type VehicleSelector<T extends keyof DataFetchFns> = DataFetchFns[T];
>VehicleSelector : Symbol(VehicleSelector, Decl(constraintWithIndexedAccess.ts, 23, 121))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 24, 21))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 24, 21))

export type TypeHardcodedAsParameter2<T extends 'Boat', F extends keyof DataFetchFns[T]> = ReturnType<VehicleSelector<T>[F]>;
>TypeHardcodedAsParameter2 : Symbol(TypeHardcodedAsParameter2, Decl(constraintWithIndexedAccess.ts, 24, 69))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 25, 38))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 25, 55))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 25, 38))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>VehicleSelector : Symbol(VehicleSelector, Decl(constraintWithIndexedAccess.ts, 23, 121))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 25, 38))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 25, 55))

export type TypeGeneric1<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[T][F]>;
>TypeGeneric1 : Symbol(TypeGeneric1, Decl(constraintWithIndexedAccess.ts, 25, 125))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 26, 25))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 26, 54))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 26, 25))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 26, 25))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 26, 54))

export type TypeGeneric2<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[T][T]>; // error
>TypeGeneric2 : Symbol(TypeGeneric2, Decl(constraintWithIndexedAccess.ts, 26, 121))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 27, 25))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 27, 54))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 27, 25))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 27, 25))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 27, 25))

export type TypeGeneric3<T extends keyof DataFetchFns, F extends keyof DataFetchFns[T]> = ReturnType<DataFetchFns[F][F]>; // error
>TypeGeneric3 : Symbol(TypeGeneric3, Decl(constraintWithIndexedAccess.ts, 27, 121))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 28, 25))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 28, 54))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>T : Symbol(T, Decl(constraintWithIndexedAccess.ts, 28, 25))
>ReturnType : Symbol(ReturnType, Decl(lib.es5.d.ts, --, --))
>DataFetchFns : Symbol(DataFetchFns, Decl(constraintWithIndexedAccess.ts, 0, 0))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 28, 54))
>F : Symbol(F, Decl(constraintWithIndexedAccess.ts, 28, 54))

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