c++ - boost mutable_queue not compiling -

i have managed work through (what appears be) of initial problems, due fact of answers came other people's (unanswered) questions, not sure if heading in right direction. working boost's mutable queue , having issues when compiling.

my code, stands, is:

typedef struct _mycomparator  {     bool operator() (const prioritystruct* arg1, const prioritystruct* arg2) const     {         return arg1->key < arg2->key;      } } mycomparator;  class priorityqueue {     typedef prioritystruct* entry;     typedef boost::typed_identity_property_map<entry> prop_map;      typedef boost::mutable_queue<entry, std::vector<entry>, mycomparator, prop_map> priority_queue_notamb;     priority_queue_notamb* pq;     boost::mutex mut; public:     priorityqueue(void); }  priorityqueue::priorityqueue() {     pq = new priority_queue_notamb(sizeof(entry)*2, mycomparator(), prop_map());     prioritystruct* ps = new prioritystruct;     pq->push(ps); } 

when remove final line, pq->push(ps), code compile , run when creating new priorityqueue type. is, errors keep compiling.

and errors are:

1>------ build started: project: priorityqueue, configuration: debug x64 ------ 1>  priorityqueue.cpp 1>c:\boost\boost\pending\mutable_queue.hpp(94): error c2679: binary '[' : no operator found takes right-hand operand of type 'priorityqueue::entry ' (or there no acceptable conversion) 1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\vector(1119): 'const unsigned __int64 &std::vector<_ty>::operator [](unsigned __int64) const' 1>          1>          [ 1>              _ty=size_t 1>          ] 1>          c:\program files (x86)\microsoft visual studio 11.0\vc\include\vector(1135): or       'unsigned __int64 &std::vector<_ty>::operator [](unsigned __int64)' 1>          1>          [ 1>              _ty=size_t 1>          ] 1>          while trying match argument list '(std::vector<_ty>, priorityqueue::entry )' 1>          1>          [ 1>              _ty=size_t 1>          ] 1>          c:\boost\boost\pending\mutable_queue.hpp(91) : while compiling class template member function 'void boost::mutable_queue<indexedtype,randomaccesscontainer,comp,id>::push(const indexedtype &)' 1>          1>          [ 1>              indexedtype=priorityqueue::entry, 1>              randomaccesscontainer=std::vector<priorityqueue::entry>, 1>              comp=mycomparator, 1>              id=priorityqueue::prop_map 1>          ] 1>          priorityqueue.cpp(7) : see reference function template instantiation 'void boost::mutable_queue<indexedtype,randomaccesscontainer,comp,id>::push(const indexedtype &)' being compiled 1>          1>          [ 1>              indexedtype=priorityqueue::entry, 1>              randomaccesscontainer=std::vector<priorityqueue::entry>, 1>              comp=mycomparator, 1>              id=priorityqueue::prop_map 1>          ] 1>          priorityqueue.cpp(5) : see reference class template instantiation 'boost::mutable_queue<indexedtype,randomaccesscontainer,comp,id>' being compiled 1>          1>          [ 1>              indexedtype=priorityqueue::entry, 1>              randomaccesscontainer=std::vector<priorityqueue::entry>, 1>              comp=mycomparator, 1>              id=priorityqueue::prop_map 1>          ] ========== build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 

any appreciated, have been unable find information on in regards how used.

edit: additional test, added

cout << (pq->empty() ? "yes" : "no") << endl; 

to see if strange happened. prints "yes" every time. replaced pq->push this, keep updated note unless receive comment or 2 asking me otherwise readability.