how to make current member-function const: a problem

[varnie]

good day.

suppose i have:

class Key;
class Value;
class CList : public boost::enable_shared_from_this<CList>
{
  std::map<Key, Value> _data;
  std::shared_ptr<CList> _pParentPtr;
public:
    //...
    bool hasKey(const Key &key) const;
    std::shared_ptr<CList> getParent() const{
        return _pParentPtr;
    }
};

bool CList::hasKey(const Key &key) {
    boost::shared_ptr<CList> pCurList(shared_from_this()); //!
    
    bool res = false;
    do{
        res = _data.find(key) != data.end();
        pCurList = pCurList->getParent();
    } while (!res && pCurList);
  
   return res;
}

how can i make CList::hasKey(c onst Key &key) const ?
thanks for clarifications.

[varnie]

i figured it out. here's solution:

bool CList::hasKey(const Key &key) const {
    boost::shared_ptr<CList const> pCurList(shared_from_this()); 
    bool res = false;
    do{
        res = _data.find(key) != data.end();
        pCurList = pCurList->getParent();
    } while (!res && pCurList);
   return res;
}