Question

I have C++/CLI class that defines a property:

public ref class AbstractOffer 
{
  public:
    AbstractOffer();

    property String^ Body;
};

In some function the AbstractOffer class is passed by const ref

foo(const AbstractOffer^ ao)
{
  ao->Body;
}

When I call the property the method compiler gives the following error :-

error C2662: ‘ivrworx::interop::AbstractOffer::Body::get’ : cannot
convert ‘this’ pointer from ‘const ivrworx::interop::AbstractOffer’
to ‘ivrworx::interop::AbstractOffer %’ 1> Conversion loses
qualifiers

It seems somehow connected to const. How can I call the Body property of the object if the object reference is passed by const?

Answer 1

The only way I know to get round this is the cast away the const-ness. As long as you don’t modify the object, it should be fine. (If you do modify it, I’ve no idea what the outcome will be).
i.e. change your function to be

void foo(const AbstractOffer^ ao)
{
  const_cast<AbstractOffer^>(ao)->Body;
}