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tests/cases/compiler/interfacePropertiesWithSameName2.ts(10,11): error TS2320: Interface 'MoverShaker' cannot simultaneously extend types 'Mover' and 'Shaker'.
Named property 'getStatus' of types 'Mover' and 'Shaker' are not identical.
tests/cases/compiler/interfacePropertiesWithSameName2.ts(26,11): error TS2320: Interface 'MoverShaker2' cannot simultaneously extend types 'Mover' and 'Shaker'.
Named property 'getStatus' of types 'Mover' and 'Shaker' are not identical.
==== tests/cases/compiler/interfacePropertiesWithSameName2.ts (2 errors) ====
interface Mover {
move(): void;
getStatus(): { speed: number; };
}
interface Shaker {
shake(): void;
getStatus(): { frequency: number; };
}
interface MoverShaker extends Mover, Shaker {
~~~~~~~~~~~
!!! error TS2320: Interface 'MoverShaker' cannot simultaneously extend types 'Mover' and 'Shaker'.
!!! error TS2320: Named property 'getStatus' of types 'Mover' and 'Shaker' are not identical.
}
// Inside a module
declare module MoversAndShakers {
export class Mover {
move(): void;
getStatus(): { speed: number; };
}
export interface Shaker {
shake(): void;
getStatus(): { frequency: number; };
}
}
interface MoverShaker2 extends MoversAndShakers.Mover, MoversAndShakers.Shaker { } // error
~~~~~~~~~~~~
!!! error TS2320: Interface 'MoverShaker2' cannot simultaneously extend types 'Mover' and 'Shaker'.
!!! error TS2320: Named property 'getStatus' of types 'Mover' and 'Shaker' are not identical.
interface MoverShaker3 extends MoversAndShakers.Mover, MoversAndShakers.Shaker {
getStatus(): { speed: number; frequency: number; }; // ok because this getStatus overrides the conflicting ones above
}
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