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tests/cases/compiler/interfaceImplementation7.ts(4,11): error TS2320: Interface 'i3' cannot simultaneously extend types 'i1' and 'i2'.
Named property 'name' of types 'i1' and 'i2' are not identical.
tests/cases/compiler/interfaceImplementation7.ts(7,7): error TS2420: Class 'C1' incorrectly implements interface 'i4'.
Types of property 'name' are incompatible.
Type '() => string' is not assignable to type '() => { s: string; n: number; }'.
Type 'string' is not assignable to type '{ s: string; n: number; }'.
==== tests/cases/compiler/interfaceImplementation7.ts (2 errors) ====
interface i1{ name(): { s: string; }; }
interface i2{ name(): { n: number; }; }
interface i3 extends i1, i2 { }
~~
!!! error TS2320: Interface 'i3' cannot simultaneously extend types 'i1' and 'i2'.
!!! error TS2320: Named property 'name' of types 'i1' and 'i2' are not identical.
interface i4 extends i1, i2 { name(): { s: string; n: number; }; }
class C1 implements i4 {
~~
!!! error TS2420: Class 'C1' incorrectly implements interface 'i4'.
!!! error TS2420: Types of property 'name' are incompatible.
!!! error TS2420: Type '() => string' is not assignable to type '() => { s: string; n: number; }'.
!!! error TS2420: Type 'string' is not assignable to type '{ s: string; n: number; }'.
public name(): string { return ""; }
}
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