File: destructureOptionalParameter.types

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=== tests/cases/compiler/destructureOptionalParameter.ts ===
declare function f1({ a, b }?: { a: number, b: string }): void;
>f1 : ({ a, b }?: {    a: number;    b: string;}) => void
>a : number
>b : string
>a : number
>b : string

function f2({ a, b }: { a: number, b: number } = { a: 0, b: 0 }) {
>f2 : ({ a, b }?: {    a: number;    b: number;}) => void
>a : number
>b : number
>a : number
>b : number
>{ a: 0, b: 0 } : { a: number; b: number; }
>a : number
>0 : 0
>b : number
>0 : 0

    a;
>a : number

    b;
>b : number
}

// Repro from #8681

interface Type { t: void }
>t : void

interface QueryMetadata { q: void }
>q : void

interface QueryMetadataFactory {
    (selector: Type | string, {descendants, read}?: {
>selector : string | Type
>descendants : boolean | undefined
>read : any

        descendants?: boolean;
>descendants : boolean | undefined

        read?: any;
>read : any

    }): ParameterDecorator;
    new (selector: Type | string, {descendants, read}?: {
>selector : string | Type
>descendants : boolean | undefined
>read : any

        descendants?: boolean;
>descendants : boolean | undefined

        read?: any;
>read : any

    }): QueryMetadata;
}