/**
 * The type of a JSONPath filter function parameter or return value, as
 * described in See section 2.4.1 of RFC 9535.
 */
export declare enum FunctionExpressionType {
    ValueType = "ValueType",
    LogicalType = "LogicalType",
    NodesType = "NodesType"
}
/**
 * A JSONPath filter function definition.
 */
export interface FilterFunction {
    /**
     * Argument types expected by the filter function.
     */
    argTypes: FunctionExpressionType[];
    /**
     * The type of the value returned by the filter function.
     */
    returnType: FunctionExpressionType;
    /**
     * A function with unknown number and type of arguments.
     */
    call(...args: unknown[]): unknown;
}