c++ - 从派生构造函数调用基类方法

Question

class Base {
    public:
    Base() {}

    void Foo(int x) {...}
};

class Derived : public Base {
    public:
    Derived(int args) {
        /* process args in some way */

        Foo(result);
    }
};

是否允许在派生类的构造函数中调用基类的方法？我想这很好，因为应该完全构造 Base 对象，但我想检查一下以防万一。

Answer 1

Is it allowed to call a method of the base class in the constructor of the derived class?

是的。请注意 virtual 函数。如果从 Derived 派生的类覆盖虚函数，同时将 Derived 构造为该进一步派生类的子对象，则动态类型始终为 Derived，因此不会调用在进一步派生类中覆盖的虚函数。 (析构函数也是如此，顺便说一句。)

I would imagine this is fine as the Base object should be fully constructed, but I wanted to check just in case.

你的推理是正确的。