/**
 * @copyright Sister Software. All rights reserved.
 * @author Teffen Ellis, et al.
 * @license
 * See LICENSE file in the project root for full license information.
 */
import { BytePairTokenMap, TokenEncodingsRecord } from './BytePairTokenMap.mjs';
import { CodePointByteMap } from './CodePointByteMap.mjs';
import { BPEVocab, RanksMap, VocabEntry } from './RanksMap.mjs';
export interface IBytePairEncodingOptions {
    /**
     * The token encoder map. This is typically derived from a `encoder.json` file:
     *
     * ```ts
     * const tokenEncodings = parseEncoderFile(fs.readFileSync('./encoder.json', 'utf-8'))
     * ```
     */
    tokenEncodings: TokenEncodingsRecord;
    /**
     * The BPE ranks map. This is typically derived from a `vocab.bpe` file:
     *
     * ```ts
     * const vocab = parseBPEFile(fs.readFileSync('./vocab.bpe', 'utf-8'))
     * ```
     *
     * You should only use this option if you are using a custom vocabulary.
     *
     * @see {@linkcode parseBPEFile}
     *
     * @default parseBPEFile(DEFAULT_VOCAB)
     */
    vocab: VocabEntry[] | BPEVocab;
    /**
     * The number of spaces to merge into a single token.
     *
     * Codex models use a different set of encodings that handle whitespace more efficiently.
     * @default 'none'
     */
    mergeSpaces?: 'none' | 'codex' | number;
    /**
     * Optional override of the regular expression used to tokenize text.
     * @default createTokenizerPattern()
     */
    tokenizationPattern?: RegExp;
}
/**
 * A base class for the Byte Pair Encoding (BPE) encoder and decoder.
 * @internal
 */
export declare class BytePairEncoding {
    codePointByteMap: CodePointByteMap;
    mergesSpacesCount: number;
    tokenMap: BytePairTokenMap;
    ranksMap: RanksMap;
    tokenizationPattern: RegExp;
    constructor(options: IBytePairEncodingOptions);
}