c++ - 重载括号运算符 [] 以获取和设置

Question

我有以下类(class):

class risc { // singleton
    protected:
        static unsigned long registers[8];

    public:
        unsigned long operator [](int i)
        {
            return registers[i];
        }
};

如您所见，我已经为“获取”实现了方括号运算符。
现在我想实现它进行设置，即:risc[1] = 2.

怎么做？

Answer 1

试试这个:

class risc { // singleton
protected:
    static unsigned long registers[8];

public:
    unsigned long operator [](int i) const    {return registers[i];}
    unsigned long & operator [](int i) {return registers[i];}
};