declare class NestingNode {
    parent: NestingNode | null;
    children: (NestingNode | string)[];
    constructor(parent: NestingNode | null);
    toString(): string;
}
/**
 * 分解公式括号嵌套关系
 */
export declare function parseNesting(str: string): NestingNode;
interface Calc {
    left: string | Calc;
    right: string | Calc;
    method: '+' | '-' | '*' | '/';
}
/**
 * 分解计算优先级层级
 */
export declare function onPrioritizeRequirements(node: string | NestingNode, children?: NestingNode['children']): Calc | string;
export declare function onCalc(calc: Calc | string, calcMethodMap: Record<Calc['method'], Function>): StrNumberValue;
export {};