/**
 * @description this module is for better performance by reducing the need to invoke string.substring() and array.slice()
 * */
export interface ArrayString {
    s: string;
    offset: number;
    length: number;
}
export declare const wrapString: (s: string) => ArrayString;
export interface ArrayData<A> {
    s: string | A[];
    offset: number;
    length: number;
}
export declare const wrapArray: <A>(s: string | A[]) => ArrayData<A>;
export declare const pop: <A>(x: ArrayData<A>) => ArrayData<A>;
export declare const wrappedLast: <A>(x: ArrayData<A>) => A;