using enum says invalid conversion from 'int' to 'type'

Question

In my class I defined an enum like this:

class myClass 
{
 public:
    enum access {
      forL,
      forM,
      forA
    };
    typedef access AccessType;
            


        

Answer 1

I just had same issue. i have to initialize an object from what i read in an xml file and for sure, i have no control over what could happen to that file.

Constructor has an enum as argument :

enum status_t { NOT_STARTED, STARTED, DONE };
MyObject::MyObject(int id, status_t status) : m_id(id), m_status(status){}

So when parsing the Xml i have to cast it. I prefered then to handle the cast in the constructor so the other classes do not have to know which is the valid enums.

MyObject::MyObject(int id, int status) : m_id(id){
    m_status = status_t(status);
}

But no way to be sure the value coming from xml will be in the correct range.

Here is the solution i came with :

MyObject::MyObject(int id, int status) : m_id(id){
    switch(status){
        case NOT_STARTED:
        case STARTED:
        case DONE:
            m_status=status_t(status);
            break;
        default:
            m_status=NOT_STARTED;
            break;
    }
}

This is an implementation choice, to force a default value in case of non consistent data. One could prefer throwing out an exception, in my case it will do this way.