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tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithMultipleBases4.ts(19,11): error TS2320: Interface 'A<T>' cannot simultaneously extend types 'C<string>' and 'C<number>'.
Named property 'a' of types 'C<string>' and 'C<number>' are not identical.
==== tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithMultipleBases4.ts (1 errors) ====
// merged interfaces behave as if all extends clauses from each declaration are merged together
class C<T> {
a: T;
}
class C2<T> {
b: T;
}
class C3<T> {
c: T;
}
class C4<T> {
d: T;
}
interface A<T> extends C<string>, C3<string> { // error
~
!!! error TS2320: Interface 'A<T>' cannot simultaneously extend types 'C<string>' and 'C<number>'.
!!! error TS2320: Named property 'a' of types 'C<string>' and 'C<number>' are not identical.
y: T;
}
interface A<T> extends C<number>, C4<string> {
z: T;
}
class D implements A<boolean> {
a: string;
b: string;
c: string;
d: string;
y: boolean;
z: boolean;
}
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