/**
 * Partitions a string based on character indices.
 *
 * @param {string} str - string to partition
 * @param {[number,number][]} indices - array of tuples to match [start, end] indices
 * @param {function} callback - callback function called with matching characters
 */
declare function strind<T = string>(str: string, indices: TupleIndices[] | TupleIndices, callback?: (params: {
    chars: string;
    matches: boolean;
}) => T): {
    unmatched: INonmatched[];
    matched: string[] | T[];
};
declare type TupleIndices = [number, number];
interface INonmatched {
    chars: string;
    index: number;
}
export default strind;