export declare enum PddlTokenType {
    /** Open bracket with the operator name, e.g. `(+` or `(:action` or `(increase` */
    OpenBracketOperator = "OPEN_BRACKET_OPERATOR",
    /** Open bracket `(` */
    OpenBracket = "OPEN_BRACKET",
    /** Close bracket `)` */
    CloseBracket = "CLOSE_BRACKET",
    /** Keyword e.g. `:parameters` or `:effect` */
    Keyword = "KEYWORD",
    /** Dash character. */
    Dash = "DASH",
    /** Parameter name e.g. `?p1`. */
    Parameter = "PARAMETER",
    /** Vertical or horizontal whitespace. */
    Whitespace = "WHITESPACE",
    /** Other unclassified token. */
    Other = "OTHER",
    /** Comment i.e. anything after `;`, including the semicolon */
    Comment = "COMMENT",
    /** Document is the root node type. */
    Document = "DOCUMENT"
}
export declare abstract class TextRange {
    /** Index of first character of the token. */
    abstract getStart(): number;
    /** Index in the document text just after the last character of the token. */
    abstract getEnd(): number;
    includesIndex(symbolIndex: number): boolean;
}
/** PDDL syntax token. */
export declare class PddlToken extends TextRange {
    readonly type: PddlTokenType;
    readonly tokenText: string;
    private readonly start;
    /** Index in the document text just after the last character of the token. */
    private readonly end;
    /**
     * Constructs.
     * @param type token type
     * @param tokenText token content
     * @param start first character of the token
     */
    constructor(type: PddlTokenType, tokenText: string, start: number);
    /**
     * Creates token from a regex match result.
     * @param type token type
     * @param match regex match
     */
    static from(type: PddlTokenType, match: RegExpExecArray): PddlToken;
    getStart(): number;
    getEnd(): number;
    toString(): string;
}
/** Tokenizes PDDL documents. */
export declare class PddlTokenizer {
    /**
     * Starts tokenizing.
     * @param pddlText input PDDL text
     * @param callback callback to call when a new token is encountered
     * @param lastIndexOfInterest last index of interest or `undefined` to parse the entire document
     */
    constructor(pddlText: string, callback: (token: PddlToken) => void, lastIndexOfInterest?: number);
}
export declare function isOpenBracket(token: PddlToken): boolean;