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=== tests/cases/conformance/types/objectTypeLiteral/methodSignatures/objectTypesWithOptionalProperties2.ts ===
// Illegal attempts to define optional methods
var a: {
>a : { x(): any; number: any; }
x()?: number; // error
>x : () => any
>number : any
}
interface I {
x()?: number; // error
>x : () => any
>number : any
}
class C {
>C : C
x()?: number; // error
>x : () => any
>number : any
}
interface I2<T> {
x()?: T; // error
>x : () => any
>T : any
}
class C2<T> {
>C2 : C2<T>
x()?: T; // error
>x : () => any
>T : any
}
var b = {
>b : { x(): any; 1: any; }
>{ x()?: 1 // error} : { x(): any; 1: any; }
x()?: 1 // error
>x : () => any
>1 : any
}
> : any
|
