import { Token } from "wordmap-lexer";
import PermutationIndex from "./PermutationIndex";
import StaticIndex from "./StaticIndex";
/**
 * A collection of indexes for the corpus.
 */
export default class CorpusIndex {
    private permutationIndex;
    private staticIndex;
    /**
     * Returns an index of permutation metrics.
     */
    readonly permutations: PermutationIndex;
    /**
     * Returns an index of static metrics.
     */
    readonly static: StaticIndex;
    constructor();
    /**
     * Appends sentences to the index.
     * The tokens must contain positional metrics for better accuracy.
     *
     * @param {Token[][]} source
     * @param {Token[][]} target
     * @param maxSourceNgramLength
     * @param maxTargetNgramLength
     */
    append(source: Token[][], target: Token[][], maxSourceNgramLength: number, maxTargetNgramLength: number): void;
}