export declare const formalIMAPSyntax: {
    readonly ALPHA: string;
    readonly ASTRING_CHAR: string;
    readonly ATOM_CHAR: string;
    readonly ATOM_SPECIALS: string;
    readonly CHAR: string;
    readonly CHAR8: string;
    readonly COMMAND_CHAR: string;
    readonly CTL: string;
    readonly DIGIT: string;
    readonly DQUOTE: "\"";
    readonly LIST_WILDCARDS: "%*";
    readonly QUOTED_SPECIALS: "\"\\";
    readonly RESP_SPECIALS: "]";
    readonly SP: " ";
    readonly TAG_CHAR: string;
    readonly TEXT_CHAR: string;
};
export declare const verify: (str: string, allowedChars: string) => number;
//# sourceMappingURL=formal-syntax.d.ts.map