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=== tests/cases/compiler/recursiveReverseMappedType.ts ===
// Repro from #38198
type Recur<T> = (
>Recur : Recur<T>
T extends (unknown[]) ? {} : { [K in keyof T]?: Recur<T[K]> }
) | ['marker', ...Recur<T>[]];
function join<T>(l: Recur<T>[]): Recur<T> {
>join : <T>(l: Recur<T>[]) => Recur<T>
>l : Recur<T>[]
return ['marker', ...l];
>['marker', ...l] : ["marker", ...Recur<T>[]]
>'marker' : "marker"
>...l : Recur<T>
>l : Recur<T>[]
}
function a<T>(l: Recur<T>[]): void {
>a : <T>(l: Recur<T>[]) => void
>l : Recur<T>[]
const x: Recur<T> | undefined = join(l);
>x : Recur<T> | undefined
>join(l) : Recur<T>
>join : <T>(l: Recur<T>[]) => Recur<T>
>l : Recur<T>[]
}
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