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tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(41,19): error TS2430: Interface 'I2<T, U>' incorrectly extends interface 'A'.
Types of property 'a2' are incompatible.
Type 'new (x: T) => U[]' is not assignable to type 'new (x: number) => string[]'.
Types of parameters 'x' and 'x' are incompatible.
Type 'number' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(50,19): error TS2430: Interface 'I4' incorrectly extends interface 'A'.
Types of property 'a8' are incompatible.
Type 'new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U' is not assignable to type 'new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived'.
Types of parameters 'y' and 'y' are incompatible.
Types of parameters 'arg2' and 'arg2' are incompatible.
Type '{ foo: number; }' is not assignable to type 'Base'.
Types of property 'foo' are incompatible.
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(66,19): error TS2430: Interface 'I6' incorrectly extends interface 'A'.
Types of property 'a15' are incompatible.
Type 'new <T>(x: { a: T; b: T; }) => T' is not assignable to type 'new (x: { a: string; b: number; }) => number'.
Types of parameters 'x' and 'x' are incompatible.
Type '{ a: string; b: number; }' is not assignable to type '{ a: string; b: string; }'.
Types of property 'b' are incompatible.
Type 'number' is not assignable to type 'string'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(70,19): error TS2430: Interface 'I7' incorrectly extends interface 'A'.
Types of property 'a15' are incompatible.
Type 'new <T extends Base>(x: { a: T; b: T; }) => number' is not assignable to type 'new (x: { a: string; b: number; }) => number'.
Types of parameters 'x' and 'x' are incompatible.
Type '{ a: string; b: number; }' is not assignable to type '{ a: Base; b: Base; }'.
Types of property 'a' are incompatible.
Type 'string' is not assignable to type 'Base'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(86,19): error TS2430: Interface 'I6' incorrectly extends interface 'B'.
Types of property 'a2' are incompatible.
Type 'new <T>(x: T) => string[]' is not assignable to type 'new <T>(x: T) => T[]'.
Type 'string[]' is not assignable to type 'T[]'.
Type 'string' is not assignable to type 'T'.
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(95,19): error TS2430: Interface 'I7' incorrectly extends interface 'C'.
Types of property 'a2' are incompatible.
Type 'new <T>(x: T) => T[]' is not assignable to type 'new <T>(x: T) => string[]'.
Type 'T[]' is not assignable to type 'string[]'.
Type 'T' is not assignable to type 'string'.
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts (6 errors) ====
// checking subtype relations for function types as it relates to contextual signature instantiation
// error cases
module Errors {
class Base { foo: string; }
class Derived extends Base { bar: string; }
class Derived2 extends Derived { baz: string; }
class OtherDerived extends Base { bing: string; }
module WithNonGenericSignaturesInBaseType {
// base type with non-generic call signatures
interface A {
a2: new (x: number) => string[];
a7: new (x: (arg: Base) => Derived) => (r: Base) => Derived2;
a8: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
a10: new (...x: Base[]) => Base;
a11: new (x: { foo: string }, y: { foo: string; bar: string }) => Base;
a12: new (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
a14: {
new (x: number): number[];
new (x: string): string[];
};
a15: new (x: { a: string; b: number }) => number;
a16: {
// type of parameter is overload set which means we can't do inference based on this type
new (x: {
new (a: number): number;
new (a?: number): number;
}): number[];
new (x: {
new (a: boolean): boolean;
new (a?: boolean): boolean;
}): boolean[];
};
}
interface I extends A {
a2: new <T, U>(x: T) => U[]; // error, contextual signature instantiation doesn't relate return types so U is {}, not a subtype of string[]
}
interface I2<T, U> extends A {
~~
!!! error TS2430: Interface 'I2<T, U>' incorrectly extends interface 'A'.
!!! error TS2430: Types of property 'a2' are incompatible.
!!! error TS2430: Type 'new (x: T) => U[]' is not assignable to type 'new (x: number) => string[]'.
!!! error TS2430: Types of parameters 'x' and 'x' are incompatible.
!!! error TS2430: Type 'number' is not assignable to type 'T'.
a2: new (x: T) => U[]; // error, no contextual signature instantiation since I2.a2 is not generic
}
interface I3 extends A {
// valid, no inferences for V so it defaults to Derived2
a7: new <T extends Base, U extends Derived, V extends Derived2>(x: (arg: T) => U) => (r: T) => V;
}
interface I4 extends A {
~~
!!! error TS2430: Interface 'I4' incorrectly extends interface 'A'.
!!! error TS2430: Types of property 'a8' are incompatible.
!!! error TS2430: Type 'new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U' is not assignable to type 'new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived'.
!!! error TS2430: Types of parameters 'y' and 'y' are incompatible.
!!! error TS2430: Types of parameters 'arg2' and 'arg2' are incompatible.
!!! error TS2430: Type '{ foo: number; }' is not assignable to type 'Base'.
!!! error TS2430: Types of property 'foo' are incompatible.
!!! error TS2430: Type 'number' is not assignable to type 'string'.
a8: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U; // error, type mismatch
}
interface I4B extends A {
a10: new <T extends Derived>(...x: T[]) => T; // valid, parameter covariance works even after contextual signature instantiation
}
interface I4C extends A {
a11: new <T extends Derived>(x: T, y: T) => T; // valid, even though x is a Base, parameter covariance works even after contextual signature instantiation
}
interface I4E extends A {
a12: new <T extends Array<Derived2>>(x: Array<Base>, y: Array<Base>) => T; // valid, no inferences for T, defaults to Array<Derived2>
}
interface I6 extends A {
~~
!!! error TS2430: Interface 'I6' incorrectly extends interface 'A'.
!!! error TS2430: Types of property 'a15' are incompatible.
!!! error TS2430: Type 'new <T>(x: { a: T; b: T; }) => T' is not assignable to type 'new (x: { a: string; b: number; }) => number'.
!!! error TS2430: Types of parameters 'x' and 'x' are incompatible.
!!! error TS2430: Type '{ a: string; b: number; }' is not assignable to type '{ a: string; b: string; }'.
!!! error TS2430: Types of property 'b' are incompatible.
!!! error TS2430: Type 'number' is not assignable to type 'string'.
a15: new <T>(x: { a: T; b: T }) => T; // error, T is {} which isn't an acceptable return type
}
interface I7 extends A {
~~
!!! error TS2430: Interface 'I7' incorrectly extends interface 'A'.
!!! error TS2430: Types of property 'a15' are incompatible.
!!! error TS2430: Type 'new <T extends Base>(x: { a: T; b: T; }) => number' is not assignable to type 'new (x: { a: string; b: number; }) => number'.
!!! error TS2430: Types of parameters 'x' and 'x' are incompatible.
!!! error TS2430: Type '{ a: string; b: number; }' is not assignable to type '{ a: Base; b: Base; }'.
!!! error TS2430: Types of property 'a' are incompatible.
!!! error TS2430: Type 'string' is not assignable to type 'Base'.
a15: new <T extends Base>(x: { a: T; b: T }) => number; // error, T defaults to Base, which is not compatible with number or string
}
interface I8 extends A {
// ok, we relate each signature of a16 to b16, and within that, we make inferences from two different signatures in the respective A.a16 signature
a16: new <T>(x: new (a: T) => T) => T[];
}
}
module WithGenericSignaturesInBaseType {
// base type has generic call signature
interface B {
a2: new <T>(x: T) => T[];
}
interface I6 extends B {
~~
!!! error TS2430: Interface 'I6' incorrectly extends interface 'B'.
!!! error TS2430: Types of property 'a2' are incompatible.
!!! error TS2430: Type 'new <T>(x: T) => string[]' is not assignable to type 'new <T>(x: T) => T[]'.
!!! error TS2430: Type 'string[]' is not assignable to type 'T[]'.
!!! error TS2430: Type 'string' is not assignable to type 'T'.
a2: new <T>(x: T) => string[]; // error
}
// base type has generic call signature
interface C {
a2: new <T>(x: T) => string[];
}
interface I7 extends C {
~~
!!! error TS2430: Interface 'I7' incorrectly extends interface 'C'.
!!! error TS2430: Types of property 'a2' are incompatible.
!!! error TS2430: Type 'new <T>(x: T) => T[]' is not assignable to type 'new <T>(x: T) => string[]'.
!!! error TS2430: Type 'T[]' is not assignable to type 'string[]'.
!!! error TS2430: Type 'T' is not assignable to type 'string'.
a2: new <T>(x: T) => T[]; // error
}
// base type has a generic call signature with overloads
interface D {
a14: {
new <T extends Derived>(x: T): number[];
new <U extends Base>(x: U): number[];
};
}
interface I8 extends D {
a14: new <T extends Base>(x: T) => number[];
}
}
}
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