import type { NormalizerData } from '../../normalizer-data';
import type { RNode } from '../../../../model/model';
import type { NamedJsonEntry } from '../../../json/format';
/**
 * Parses the construct as a {@link RUnaryOp}.
 *
 * @param data     - The data used by the parser (see {@link NormalizerData})
 * @param operator - The operator token
 * @param operand  - The operand of the unary operator
 *
 * @returns The parsed {@link RUnaryOp} or `undefined` if the given construct is not a unary operator
 */
export declare function tryNormalizeUnary(data: NormalizerData, [operator, operand]: [NamedJsonEntry, NamedJsonEntry]): RNode | undefined;