export interface Terminal {
    type: string;
    pattern: RegExp;
}
export interface LexTree {
    type: string;
    match: RegExpMatchArray;
    index: number;
    line: number;
}
export interface LexTreeUnknown extends LexTree {
    type: "unknown";
}
export declare class Lexer {
    private terminals;
    static split(input: string, comment?: RegExp): LexTree[];
    static splitOffside(input: string, comment?: RegExp): LexTree[];
    constructor(terminals: Terminal[]);
    next(token: LexTreeUnknown, index?: number, activeTerminals?: Record<string, any>): LexTree;
    lex(tokens: LexTree[]): LexTree[];
}