export default class Tokenizer {
    private readonly WHITESPACE_REGEX;
    private readonly NUMBER_REGEX;
    private readonly OPERATOR_REGEX;
    private readonly BLOCK_COMMENT_REGEX;
    private readonly LINE_COMMENT_REGEX;
    private readonly RESERVED_TOPLEVEL_REGEX;
    private readonly RESERVED_NEWLINE_REGEX;
    private readonly RESERVED_PLAIN_REGEX;
    private readonly WORD_REGEX;
    private readonly STRING_REGEX;
    private readonly OPEN_PAREN_REGEX;
    private readonly CLOSE_PAREN_REGEX;
    private readonly INDEXED_PLACEHOLDER_REGEX;
    private readonly IDENT_NAMED_PLACEHOLDER_REGEX;
    private readonly STRING_NAMED_PLACEHOLDER_REGEX;
    private readonly upperCase;
    /**
     * @param {Object} cfg
     *  @param {String[]} cfg.reservedWords Reserved words in SQL
     *  @param {String[]} cfg.reservedToplevelWords Words that are set to new line separately
     *  @param {String[]} cfg.reservedNewlineWords Words that are set to newline
     *  @param {String[]} cfg.stringTypes String types to enable: "", '', ``, [], N''
     *  @param {String[]} cfg.openParens Opening parentheses to enable, like (, [
     *  @param {String[]} cfg.closeParens Closing parentheses to enable, like ), ]
     *  @param {String[]} cfg.indexedPlaceholderTypes Prefixes for indexed placeholders, like ?
     *  @param {String[]} cfg.namedPlaceholderTypes Prefixes for named placeholders, like @ and :
     *  @param {String[]} cfg.lineCommentTypes Line comments to enable, like # and --
     *  @param {String[]} cfg.specialWordChars Special chars that can be found inside of words, like @ and #
     * @param {boolean} cfg.upperCase
     */
    constructor(cfg: any);
    createLineCommentRegex(lineCommentTypes: any): RegExp;
    createReservedWordRegex(reservedWords: any): RegExp;
    createWordRegex(specialChars?: any[]): RegExp;
    createStringRegex(stringTypes: any): RegExp;
    createStringPattern(stringTypes: any): any;
    createParenRegex(parens: any): RegExp;
    escapeParen(paren: any): string;
    createPlaceholderRegex(types: any, pattern: any): false | RegExp;
    /**
     * Takes a SQL string and breaks it into tokens.
     * Each token is an object with type and value.
     *
     * @param {String} input The SQL string
     * @return {Object[]} tokens An array of tokens.
     *  @return {String} token.type
     *  @return {String} token.value
     */
    tokenize(input: any): any[];
    getNextToken(input: any, previousToken: any): any;
    getWhitespaceToken(input: any): any;
    getCommentToken(input: any): any;
    getLineCommentToken(input: any): any;
    getBlockCommentToken(input: any): any;
    getStringToken(input: any): any;
    getOpenParenToken(input: any): any;
    getCloseParenToken(input: any): any;
    getPlaceholderToken(input: any): any;
    getIdentNamedPlaceholderToken(input: any): any;
    getStringNamedPlaceholderToken(input: any): any;
    getIndexedPlaceholderToken(input: any): any;
    getPlaceholderTokenWithKey({ input, regex, parseKey }: {
        input: any;
        regex: any;
        parseKey: any;
    }): any;
    getEscapedPlaceholderKey({ key, quoteChar }: {
        key: any;
        quoteChar: any;
    }): any;
    getNumberToken(input: any): any;
    getOperatorToken(input: any): any;
    getReservedWordToken(input: any, previousToken: any): any;
    getToplevelReservedToken(input: any): any;
    getNewlineReservedToken(input: any): any;
    getPlainReservedToken(input: any): any;
    getWordToken(input: any): any;
    getTokenOnFirstMatch({ input, type, regex }: {
        input: any;
        type: any;
        regex: any;
    }): any;
}