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//// [subtypingWithGenericCallSignaturesWithOptionalParameters.ts]
// call signatures in derived types must have the same or fewer optional parameters as the base type
module ClassTypeParam {
interface Base<T> {
a: () => T;
a2: (x?: T) => T;
a3: (x: T) => T;
a4: (x: T, y?: T) => T;
a5: (x?: T, y?: T) => T;
}
interface I1<T> extends Base<T> {
a: () => T; // ok, same T of required params
}
interface I2<T> extends Base<T> {
a: (x?: T) => T; // ok, same T of required params
}
interface I3<T> extends Base<T> {
a: (x: T) => T; // error, too many required params
}
interface I4<T> extends Base<T> {
a2: () => T; // ok, same T of required params
}
interface I5<T> extends Base<T> {
a2: (x?: T) => T; // ok, same T of required params
}
interface I6<T> extends Base<T> {
a2: (x: T) => T; // ok, same number of params
}
interface I7<T> extends Base<T> {
a3: () => T; // ok, fewer required params
}
interface I8<T> extends Base<T> {
a3: (x?: T) => T; // ok, fewer required params
}
interface I9<T> extends Base<T> {
a3: (x: T) => T; // ok, same T of required params
}
interface I10<T> extends Base<T> {
a3: (x: T, y: T) => T; // error, too many required params
}
interface I11<T> extends Base<T> {
a4: () => T; // ok, fewer required params
}
interface I12<T> extends Base<T> {
a4: (x?: T, y?: T) => T; // ok, fewer required params
}
interface I13<T> extends Base<T> {
a4: (x: T) => T; // ok, same T of required params
}
interface I14<T> extends Base<T> {
a4: (x: T, y: T) => T; // ok, same number of params
}
interface I15<T> extends Base<T> {
a5: () => T; // ok, fewer required params
}
interface I16<T> extends Base<T> {
a5: (x?: T, y?: T) => T; // ok, fewer required params
}
interface I17<T> extends Base<T> {
a5: (x: T) => T; // ok, all present params match
}
interface I18<T> extends Base<T> {
a5: (x: T, y: T) => T; // ok, same number of params
}
}
module GenericSignaturesInvalid {
// all of these are errors
interface Base2 {
a: <T>() => T;
a2: <T>(x?: T) => T;
a3: <T>(x: T) => T;
a4: <T>(x: T, y?: T) => T;
a5: <T>(x?: T, y?: T) => T;
}
interface I1<T> extends Base2 {
a: () => T;
}
interface I2<T> extends Base2 {
a: (x?: T) => T;
}
interface I3<T> extends Base2 {
a: (x: T) => T;
}
interface I4<T> extends Base2 {
a2: () => T;
}
interface I5<T> extends Base2 {
a2: (x?: T) => T
}
interface I6<T> extends Base2 {
a2: (x: T) => T;
}
interface I7<T> extends Base2 {
a3: () => T;
}
interface I8<T> extends Base2 {
a3: (x?: T) => T;
}
interface I9<T> extends Base2 {
a3: (x: T) => T;
}
interface I10<T> extends Base2 {
a3: (x: T, y: T) => T;
}
interface I11<T> extends Base2 {
a4: () => T;
}
interface I12<T> extends Base2 {
a4: (x?: T, y?: T) => T;
}
interface I13<T> extends Base2 {
a4: (x: T) => T;
}
interface I14<T> extends Base2 {
a4: (x: T, y: T) => T;
}
interface I15<T> extends Base2 {
a5: () => T;
}
interface I16<T> extends Base2 {
a5: (x?: T, y?: T) => T;
}
interface I17<T> extends Base2 {
a5: (x: T) => T;
}
interface I18<T> extends Base2 {
a5: (x: T, y: T) => T;
}
}
module GenericSignaturesValid {
interface Base2 {
a: <T>() => T;
a2: <T>(x?: T) => T;
a3: <T>(x: T) => T;
a4: <T>(x: T, y?: T) => T;
a5: <T>(x?: T, y?: T) => T;
}
// BUG 833350
interface I1 extends Base2 {
a: <T>() => T; // ok, same number of required params
}
interface I2 extends Base2 {
a: <T>(x?: T) => T; // error, not identical and contextual signature instatiation can't make inference from T to T
}
interface I3 extends Base2 {
a: <T>(x: T) => T; // error, not identical and contextual signature instatiation can't make inference from T to T
}
interface I4 extends Base2 {
a2: <T>() => T; // error, not identical and contextual signature instatiation can't make inference from T to T
}
interface I5 extends Base2 {
a2: <T>(x?: T) => T; // ok, identical
}
interface I6 extends Base2 {
a2: <T>(x: T) => T; // ok, same number of params
}
interface I7 extends Base2 {
a3: <T>() => T; // error, no inferences for T so {} not assignable to {} in return type
}
interface I8 extends Base2 {
a3: <T>(x?: T) => T; // ok, fewer required params
}
interface I9 extends Base2 {
a3: <T>(x: T) => T; // ok, identical, same number of required params
}
interface I10 extends Base2 {
a3: <T>(x: T, y: T) => T; // error, too many required params
}
interface I11 extends Base2 {
a4: <T>() => T; // error, not identical and contextual signature instatiation can't make inference from T to T
}
interface I12 extends Base2 {
a4: <T>(x?: T, y?: T) => T; // ok, fewer required params
}
interface I13 extends Base2 {
a4: <T>(x: T) => T; // ok, same T of required params
}
interface I14 extends Base2 {
a4: <T>(x: T, y: T) => T; // error, too many required params
}
interface I15 extends Base2 {
a5: <T>() => T; // error, not identical and contextual signature instatiation can't make inference from T to T
}
interface I16 extends Base2 {
a5: <T>(x?: T, y?: T) => T; // ok, fewer required params
}
interface I17 extends Base2 {
a5: <T>(x: T) => T; // ok, all present params match
}
interface I18 extends Base2 {
a5: <T>(x: T, y: T) => T; // ok, same number of params
}
}
//// [subtypingWithGenericCallSignaturesWithOptionalParameters.js]
// call signatures in derived types must have the same or fewer optional parameters as the base type
|
