初始化派生类虚函数返回的内联静态变量的最佳方法

#include <iostream>

class Base {
public:
    virtual int getValue() {
        static int value = initializeValue();
        return value;
    }

private:
    static int initializeValue() {
        // 在这里进行初始化
        std::cout << "Initializing value..." << std::endl;
        return 42;
    }
};

class Derived : public Base {
public:
    int getValue() override {
        return Base::getValue();
    }
};

int main() {
    Derived derived;
    std::cout << derived.getValue() << std::endl;
    std::cout << derived.getValue() << std::endl;

    return 0;
}

Initializing value...
42
42