One of my functions organizes objects based on the length of an input array. For example:
fn(['a']) -> Record<string, string>
fn(['a', 'b']) -> Record<Record<string, string>>
I've defined the return type as:
type Ret = {
[k: string]: string | Ret;
}
However, this setup doesn't account for the depth of the object. If the input is a TypeScript tuple, then theoretically it should be possible to determine the depth of the return type. Is there currently a way to achieve this?
By utilizing a recursively defined conditional type:
type NestedStructure<T extends any[]>
= T extends [any, ...infer R]
? Structure<string, NestedStructure<R>>
: string
For instance:
type Example = NestedStructure<['a', 'b']>
// {[x: string]: Structure<string, string>}
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