144 lines
No EOL
7.5 KiB
Text
144 lines
No EOL
7.5 KiB
Text
tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(41,19): error TS2430: Interface 'I2<T, U>' incorrectly extends interface 'A'.
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Types of property 'a2' are incompatible.
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Type 'new (x: T) => U[]' is not assignable to type 'new (x: number) => string[]'.
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Types of parameters 'x' and 'x' are incompatible.
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Type 'T' is not assignable to type 'number'.
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tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts(50,19): error TS2430: Interface 'I4' incorrectly extends interface 'A'.
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Types of property 'a8' are incompatible.
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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'.
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Types of parameters 'y' and 'y' are incompatible.
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Type '(arg2: { foo: number; }) => any' is not assignable to type '(arg2: Base) => Derived'.
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Types of parameters 'arg2' and 'arg2' are incompatible.
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Type '{ foo: number; }' is not assignable to type 'Base'.
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Types of property 'foo' are incompatible.
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Type 'number' is not assignable to type 'string'.
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==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/constructSignatureAssignabilityInInheritance3.ts (2 errors) ====
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// checking subtype relations for function types as it relates to contextual signature instantiation
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// error cases
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module Errors {
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class Base { foo: string; }
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class Derived extends Base { bar: string; }
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class Derived2 extends Derived { baz: string; }
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class OtherDerived extends Base { bing: string; }
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module WithNonGenericSignaturesInBaseType {
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// base type with non-generic call signatures
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interface A {
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a2: new (x: number) => string[];
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a7: new (x: (arg: Base) => Derived) => (r: Base) => Derived2;
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a8: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
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a10: new (...x: Base[]) => Base;
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a11: new (x: { foo: string }, y: { foo: string; bar: string }) => Base;
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a12: new (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
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a14: {
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new (x: number): number[];
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new (x: string): string[];
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};
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a15: new (x: { a: string; b: number }) => number;
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a16: {
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// type of parameter is overload set which means we can't do inference based on this type
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new (x: {
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new (a: number): number;
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new (a?: number): number;
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}): number[];
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new (x: {
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new (a: boolean): boolean;
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new (a?: boolean): boolean;
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}): boolean[];
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};
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}
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interface I extends A {
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a2: new <T, U>(x: T) => U[]; // error, contextual signature instantiation doesn't relate return types so U is {}, not a subtype of string[]
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}
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interface I2<T, U> extends A {
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~~
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!!! error TS2430: Interface 'I2<T, U>' incorrectly extends interface 'A'.
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!!! error TS2430: Types of property 'a2' are incompatible.
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!!! error TS2430: Type 'new (x: T) => U[]' is not assignable to type 'new (x: number) => string[]'.
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!!! error TS2430: Types of parameters 'x' and 'x' are incompatible.
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!!! error TS2430: Type 'T' is not assignable to type 'number'.
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a2: new (x: T) => U[]; // error, no contextual signature instantiation since I2.a2 is not generic
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}
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interface I3 extends A {
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// valid, no inferences for V so it defaults to Derived2
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a7: new <T extends Base, U extends Derived, V extends Derived2>(x: (arg: T) => U) => (r: T) => V;
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}
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interface I4 extends A {
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~~
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!!! error TS2430: Interface 'I4' incorrectly extends interface 'A'.
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!!! error TS2430: Types of property 'a8' are incompatible.
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!!! 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'.
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!!! error TS2430: Types of parameters 'y' and 'y' are incompatible.
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!!! error TS2430: Type '(arg2: { foo: number; }) => any' is not assignable to type '(arg2: Base) => Derived'.
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!!! error TS2430: Types of parameters 'arg2' and 'arg2' are incompatible.
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!!! error TS2430: Type '{ foo: number; }' is not assignable to type 'Base'.
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!!! error TS2430: Types of property 'foo' are incompatible.
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!!! error TS2430: Type 'number' is not assignable to type 'string'.
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a8: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: number; }) => U) => (r: T) => U; // error, type mismatch
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}
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interface I4B extends A {
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a10: new <T extends Derived>(...x: T[]) => T; // valid, parameter covariance works even after contextual signature instantiation
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}
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interface I4C extends A {
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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
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}
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interface I4E extends A {
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a12: new <T extends Array<Derived2>>(x: Array<Base>, y: Array<Base>) => T; // valid, no inferences for T, defaults to Array<Derived2>
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}
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interface I6 extends A {
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a15: new <T>(x: { a: T; b: T }) => T; // error, T is {} which isn't an acceptable return type
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}
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interface I7 extends A {
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a15: new <T extends Base>(x: { a: T; b: T }) => number; // error, T defaults to Base, which is not compatible with number or string
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}
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interface I8 extends A {
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// 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
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a16: new <T>(x: new (a: T) => T) => T[];
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}
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}
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module WithGenericSignaturesInBaseType {
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// base type has generic call signature
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interface B {
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a2: new <T>(x: T) => T[];
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}
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interface I6 extends B {
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a2: new <T>(x: T) => string[]; // error
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}
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// base type has generic call signature
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interface C {
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a2: new <T>(x: T) => string[];
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}
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interface I7 extends C {
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a2: new <T>(x: T) => T[]; // error
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}
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// base type has a generic call signature with overloads
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interface D {
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a14: {
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new <T extends Derived>(x: T): number[];
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new <U extends Base>(x: U): number[];
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};
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}
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interface I8 extends D {
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a14: new <T extends Base>(x: T) => number[];
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}
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}
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} |