import { InputStream } from './input_stream';
export declare enum TokenType {
    Plural = 0,
    Select = 1,
    Text = 2,
    Variable = 3
}
export interface Token {
    type: TokenType;
    value: string;
    options?: Record<string, Token[]>;
}
export declare class TokenStream {
    readonly input: InputStream;
    constructor(message: string);
    next(): Token;
    private skip;
    private readWhile;
    private readVariable;
    private readText;
    private readVariableType;
    private readVariableOptions;
    private readExpression;
}