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//// [subtypingWithCallSignaturesWithRestParameters.ts]
// call signatures in derived types must have the same or fewer optional parameters as the base type
interface Base {
a: (...args: number[]) => number;
a2: (x: number, ...z: number[]) => number;
a3: (x: number, y?: string, ...z: number[]) => number;
a4: (x?: number, y?: string, ...z: number[]) => number;
}
interface I1 extends Base {
a: () => number; // ok, same number of required params
}
interface I1B extends Base {
a: (...args: number[]) => number; // ok, same number of required params
}
interface I1C extends Base {
a: (...args: string[]) => number; // error, type mismatch
}
interface I2 extends Base {
a: (x?: number) => number; // ok, same number of required params
}
interface I2B extends Base {
a: (x?: number, y?: number, z?: number) => number; // ok, same number of required params
}
interface I3 extends Base {
a: (x: number) => number; // ok, all present params match
}
interface I3B extends Base {
a: (x?: string) => number; // error, incompatible type
}
interface I4 extends Base {
a2: () => number; // ok, fewer required params
}
interface I4B extends Base {
a2: (...args: number[]) => number; // ok, fewer required params
}
interface I5 extends Base {
a2: (x?: number) => number; // ok, fewer required params
}
interface I6 extends Base {
a2: (x: number) => number; // ok, same number of required params
}
interface I6B extends Base {
a2: (x: number, ...args: number[]) => number; // ok, same number of required params
}
interface I6C extends Base {
a2: (x: number, ...args: string[]) => number; // error
}
interface I6D extends Base {
a2: (x: number, y: number) => number; // ok, all present params match
}
interface I6E extends Base {
a2: (x: number, y?: number) => number; // ok, same number of required params
}
interface I7 extends Base {
a3: () => number; // ok, fewer required params
}
interface I8 extends Base {
a3: (x?: number) => number; // ok, fewer required params
}
interface I9 extends Base {
a3: (x: number) => number; // ok, same number of required params
}
interface I10 extends Base {
a3: (x: number, y: string) => number; // ok, all present params match
}
interface I10B extends Base {
a3: (x: number, y?: number, z?: number) => number; // error
}
interface I10C extends Base {
a3: (x: number, ...z: number[]) => number; // error
}
interface I10D extends Base {
a3: (x: string, y?: string, z?: string) => number; // error, incompatible types
}
interface I10E extends Base {
a3: (x: number, ...z: string[]) => number; // error
}
interface I11 extends Base {
a4: () => number; // ok, fewer required params
}
interface I12 extends Base {
a4: (x?: number, y?: number) => number; // error, type mismatch
}
interface I13 extends Base {
a4: (x: number) => number; // ok, all present params match
}
interface I14 extends Base {
a4: (x: number, y?: number) => number; // error, second param has type mismatch
}
interface I15 extends Base {
a4: (x?: number, y?: string) => number; // ok, same number of required params with matching types
}
interface I16 extends Base {
a4: (x: number, ...args: string[]) => number; // error, rest param has type mismatch
}
interface I17 extends Base {
a4: (...args: number[]) => number; // error
}
//// [subtypingWithCallSignaturesWithRestParameters.js]
// call signatures in derived types must have the same or fewer optional parameters as the base type
|
