IntPtr search(const std::string& key) { IntPtr i; MapTable::const_iterator it = mt.find(key); if (it != mt.end()) { i = it->second; // can't compile it?? } return i; } On Tue, Dec 1, 2009 at 8:12 PM, hce <webmail.hce@gmail.com> wrote:

Hi,

I defined a shared_ptr in to a map table. How can I return a NULL pointer in a function to search the table if it is not found as following example?

typedef shared_ptr<int> IntPtr; typedef std::map<std::string IntPtr> MapTable;

MapTable mt;

IntPtr search(const std::string& key) { MapTable::const_iterator it = mt.find(key); if (it == mt.end()) { return NULL; // can't compile it?? } return it->second; }

Thank you.

Kind regards,

Jupiter _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users