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tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithConstructSignaturesWithOptionalParameters.ts(19,11): error TS2430: Interface 'I3' incorrectly extends interface 'Base'.
Types of property 'a' are incompatible.
Type 'new (x: number) => number' is not assignable to type 'new () => number'.
tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithConstructSignaturesWithOptionalParameters.ts(49,11): error TS2430: Interface 'I10' incorrectly extends interface 'Base'.
Types of property 'a3' are incompatible.
Type 'new (x: number, y: number) => number' is not assignable to type 'new (x: number) => number'.
==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypingWithConstructSignaturesWithOptionalParameters.ts (2 errors) ====
// call signatures in derived types must have the same or fewer optional parameters as the base type
interface Base {
a: new () => number;
a2: new (x?: number) => number;
a3: new (x: number) => number;
a4: new (x: number, y?: number) => number;
a5: new (x?: number, y?: number) => number;
}
interface I1 extends Base {
a: new () => number; // ok, same number of required params
}
interface I2 extends Base {
a: new (x?: number) => number; // ok, same number of required params
}
interface I3 extends Base {
~~
!!! error TS2430: Interface 'I3' incorrectly extends interface 'Base'.
!!! error TS2430: Types of property 'a' are incompatible.
!!! error TS2430: Type 'new (x: number) => number' is not assignable to type 'new () => number'.
a: new (x: number) => number; // error, too many required params
}
interface I4 extends Base {
a2: new () => number; // ok, same number of required params
}
interface I5 extends Base {
a2: new (x?: number) => number; // ok, same number of required params
}
interface I6 extends Base {
a2: new (x: number) => number; // ok, same number of params
}
interface I7 extends Base {
a3: new () => number; // ok, fewer required params
}
interface I8 extends Base {
a3: new (x?: number) => number; // ok, fewer required params
}
interface I9 extends Base {
a3: new (x: number) => number; // ok, same number of required params
}
interface I10 extends Base {
~~~
!!! error TS2430: Interface 'I10' incorrectly extends interface 'Base'.
!!! error TS2430: Types of property 'a3' are incompatible.
!!! error TS2430: Type 'new (x: number, y: number) => number' is not assignable to type 'new (x: number) => number'.
a3: new (x: number, y: number) => number; // error, too many required params
}
interface I11 extends Base {
a4: new () => number; // ok, fewer required params
}
interface I12 extends Base {
a4: new (x?: number, y?: number) => number; // ok, fewer required params
}
interface I13 extends Base {
a4: new (x: number) => number; // ok, same number of required params
}
interface I14 extends Base {
a4: new (x: number, y: number) => number; // ok, same number of params
}
interface I15 extends Base {
a5: new () => number; // ok, fewer required params
}
interface I16 extends Base {
a5: new (x?: number, y?: number) => number; // ok, fewer required params
}
interface I17 extends Base {
a5: new (x: number) => number; // ok, all present params match
}
interface I18 extends Base {
a5: new (x: number, y: number) => number; // ok, same number of params
}
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