90 lines
2.2 KiB
TypeScript
90 lines
2.2 KiB
TypeScript
//// [subtypingWithCallSignaturesWithOptionalParameters.ts]
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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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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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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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}
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//// [subtypingWithCallSignaturesWithOptionalParameters.js]
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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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