//#region src/format-cei/format-cei.d.ts
/** Options of `formatCei`. */
export type FormatCeiOptions = {
  /** Whether to left pad the value with zeros up to the number of slots in the pattern (default: `false`). */
  pad?: boolean;
};
/**
 * Formats a CEI (Cadastro Específico do INSS) number according to the usual "00.000.00000/00"
 * mask, the one the reference implementations of the check digit agree on (the Receita Federal
 * does not print it).
 *
 * Formats progressively, as far as the digits given go, so it can also be used as an input
 * mask while the user is still typing.
 *
 * @param {string|number} value - The CEI value to be formatted.
 * @param {FormatCeiOptions} [options] - Optional formatting options.
 * @param {boolean} [options.pad] - Whether to pad the value with leading zeros up to 12 digits.
 * @returns {string} The formatted CEI string in the pattern "00.000.00000/00", or an empty
 * string when there is nothing to format.
 *
 * @example
 * ```typescript
 * formatCei("277297118187"); // "27.729.71181/87"
 * formatCei(249859674386); // "24.985.96743/86"
 * formatCei("249", { pad: true }); // "00.000.00002/49"
 * formatCei("249"); // "24.9"
 * ```
 *
 * @see Official: https://www.gov.br/receitafederal/pt-br/assuntos/orientacao-tributaria/cadastros/cno
 * The registry's own page at the Receita Federal, which describes the cadastro but does not
 * print the mask; the mask below is the one the two reference implementations of the check
 * digit cited by `isValidCei` agree on.
 */
export declare const formatCei: (value: string | number, options?: FormatCeiOptions) => string;
//#endregion