import type { MessageFunctionContext } from './index.ts';
import type { MessageNumber } from './number.ts';
/**
 * `unit` accepts as input numerical values as well as
 * objects wrapping a numerical value that also include a `unit` property.
 *
 * @beta
 */
export declare function unit(ctx: MessageFunctionContext, exprOpt: Record<string | symbol, unknown>, operand?: unknown): MessageNumber;