Question

I need B class to have a min priority queue of AToTime objects.

AToTime have operator>, and yet I receive error telling me than there is no operator> matching the operands…

#include <queue>
#include <functional>

using namespace std; 

class B
{
  public:
    B();
    virtual ~B();
  private:
    log4cxx::LoggerPtr m_logger;
    class AToTime 
    {
    public:
      AToTime(const ACE_Time_Value& time, const APtr a) : m_time(time), m_a(a){}

      bool operator >(const AToTime& other)
      {
        return m_time > other.m_time;
      }

    public:
      ACE_Time_Value m_time;
      APtr           m_a;
    };

    priority_queue<AToTime, vector<AToTime>, greater<AToTime> > m_myMinHeap;
};

Answer 1

    bool operator >(const AToTime& other)

It should be a const function.

    bool operator >(const AToTime& other) const