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