import { ASTNode } from "../../ast_node";
import { FunctionDefinition } from "../declaration";
import { Expression } from "./expression";
export declare class UnaryOperation extends Expression {
    /**
     * Indicates that operator is used as prefix `++x` (`true`)
     * or suffix `x++` (`false`)
     */
    prefix: boolean;
    /**
     * String representation of the operator.
     *
     * Note that `delete` is also an unary operation.
     */
    operator: string;
    /**
     * The expressions that the unary operation is applied to,
     * e.g. `1` for `-1` or `someArray.length` for `someArray.length--`.
     */
    vSubExpression: Expression;
    /**
     * Custom defintion that is bound to operator and used instead of default logic.
     *
     * Available since Solidity 0.8.19.
     */
    userFunction?: number;
    constructor(id: number, src: string, typeString: string, typeIdentifier: string | undefined, prefix: boolean, operator: string, subExpression: Expression, userFunction?: number, raw?: any);
    get children(): readonly ASTNode[];
    /**
     * Attribute to access the defintion, bound to the operator.
     *
     * Is `undefined` when there is no definition bound to the operator.
     */
    get vUserFunction(): FunctionDefinition | undefined;
    set vUserFunction(value: FunctionDefinition | undefined);
}
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