import { ToNumber } from "./ToNumber.js";
import { TupleKeys } from "./TupleKeys.js";
/**
 * Check if K is a fixed index in tuple T (not part of the rest portion).
 */
type IsRestKeyOrOptional<T extends readonly unknown[], K extends string | number> = K extends TupleKeys<T> ? (T[K] extends undefined ? true : false) : true;
/**
 * Can't simply use T[K] because if T is a union type, then K may not be a key,
 * when really we want to just treat it as an optional key.
 */
export type GetKey<T, K extends string | number> = T extends readonly unknown[] ? IsRestKeyOrOptional<T, K> extends true ? T[ToNumber<K>] | undefined : T[ToNumber<K>] : T extends {
    [k in K]: infer V;
} ? V : T extends {
    [k in K]?: infer V;
} ? V | undefined : undefined;
export {};
//# sourceMappingURL=GetKey.d.ts.map