c++ - const 成员函数只能调用 const 成员函数吗？

Question

const 成员函数是否只调用const 成员函数？

class Transmitter{
  const static string msg;
  mutable int size;
  public: 
    void xmit() const{
    size = compute();
    cout<<msg;
  }
  private:
   int compute() const{return 5;}
};

 string const Transmitter::msg = "beep";

 int main(){
   Transmitter t;
   t.xmit();
   return EXIT_SUCCESS;
 }

如果我不将 compute() 设为常量，编译器就会报错。是因为 const 成员函数不允许修改成员，所以它不会允许对非常量的任何调用，因为这意味着 const 成员函数将“间接”修改数据成员？

Answer 1

Is it because since a const member function is not allowed to modify members, it wont allow any calls to non-consts since it would mean that the const member function would be 'indirectly' modifying the data members?

是的。