如何使枚举被其他类识别

How to make an enum recognized by other classes

本文关键字：识别 其他 何使 枚举      更新时间：2023-10-16

我正在我的SimulationEngine基类中创建一个名为RiskFactor的枚举。

class SimulationEngine
{
public:
enum RiskFactor { interest_rate, equities, volatility };
SimulationEngine(double horizon, Wrapper<valuationFunction>& theFunction_, RiskFactor simulatedRiskFactor);
virtual void DoOnePath(double vol, double normvariate) = 0;
virtual SimulationEngine* clone() const = 0;
const virtual double GetHorizon();
const Wrapper<valuationFunction>& GetFunction() const;
RiskFactor simulatedRiskFactor;
protected:
double horizon;
Wrapper<valuationFunction> theFunction;
};

在一个派生类中，我有这个方法，在调用对象"TheFunction"的方法时，使用类型为RiskFactor enum的"模拟风险因子"。

void OneStepBSEngine::DoOnePath(double vol, double normvariate)
{
double variance = vol * vol * horizon;
double rootVariance = sqrt(variance);
double itoCorrection = -0.5 * variance;
//double movedSpot = spotvalue * exp(drift * horizon + itoCorrection);
//spotvalue = movedSpot * exp(rootVariance * normvariate);
double factor = exp(drift * horizon + itoCorrection + rootVariance * normvariate);
theFunction->RiskFactorMultiply(factor, simulatedRiskFactor);
return;
}

我应该如何让类"theFunction"寻找它来识别枚举并允许我写最后一行(尚未工作(：

theFunction->RiskFactorMultiply(factor, simulatedRiskFactor);

该类当前如下所示：

class valuationFunction
{
public:
valuationFunction(double TTM);
virtual void ValueInstrument() = 0;
virtual double GetValue() const;
virtual void RiskFactorAdd(double increment) = 0;
virtual void RiskFactorMultiply(double factor) = 0;
virtual void UpdateTTM(double timeStep);
virtual valuationFunction* clone() const = 0;
virtual ~valuationFunction() {}
private:
protected:
double f;
double TTM;
};

我希望能够调用 RiskFactorAdd 和 RiskFactorMultiply 函数与枚举 RiskFactor。

RiskFactorMultiply的声明需要用封闭的类名限定枚举名称。

class valuationFunction
{
// ...
virtual void RiskFactorMultiply(double factor, SimulationEngine::RiskFactor risk) = 0;
// ...
};

这同样适用于枚举值，例如，如果RiskFactorMultiply想使第二个参数成为可选参数。

virtual void RiskFactorMultiply(double factor, SimulationEngine::RiskFactor risk = SimulationEngine::volatility) = 0;
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