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=== tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithMultipleBaseTypes.ts ===
// an interface may have multiple bases with properties of the same name as long as the interface's implementation satisfies all base type versions
interface Base1 {
x: {
>x : { a: string; }
a: string;
>a : string
}
}
interface Base2 {
x: {
>x : { b: string; }
b: string;
>b : string
}
}
interface Derived extends Base1, Base2 {
x: {
>x : { a: string; b: string; }
a: string; b: string;
>a : string
>b : string
}
}
interface Derived2 extends Base1, Base2 { // error
x: {
>x : { a: string; b: number; }
a: string; b: number;
>a : string
>b : number
}
}
module Generic {
interface Base1<T> {
x: {
>x : { a: T; }
a: T;
>a : T
}
}
interface Base2<T> {
x: {
>x : { b: T; }
b: T;
>b : T
}
}
interface Derived<T> extends Base1<string>, Base2<number> {
x: {
>x : { a: string; b: number; }
a: string; b: number;
>a : string
>b : number
}
}
interface Derived2<T, U> extends Base1<T>, Base2<U> {
x: {
>x : { a: T; b: U; }
a: T; b: U;
>a : T
>b : U
}
}
interface Derived3<T> extends Base1<number>, Base2<number> { } // error
interface Derived4<T> extends Base1<number>, Base2<number> { // error
x: {
>x : { a: T; b: T; }
a: T; b: T;
>a : T
>b : T
}
}
interface Derived5<T> extends Base1<T>, Base2<T> { // error
x: T;
>x : T
}
}
|
