ptr_map reference type is not a reference

[Bill Buklis <boostuser@…>]

The "reference" typedef in ptr_map and also ptr_multimap is not defined as a reference. This can be easily demonstrated with the following code:

typedef std::map<int,int*> STDCTR;
typedef boost::ptr_map<int,int> PTRCTR;

bool isrefstdit = boost::is_reference<STDCTR::iterator::reference>::value;
bool isrefstdval = boost::is_reference<STDCTR::reference>::value;
bool isrefptrit = boost::is_reference<PTRCTR::iterator::reference>::value;
bool isrefptrval = boost::is_reference<PTRCTR::reference>::value;

is_reference returns true for std::map, but false for boost::ptr_map. This was correct in v1.33.1, but is not in v1.34.1.

[Thorsten Ottosen]

This cannot be achieved with the current design because the reference type is a proxy object.

-Thorsten