sort() using a member function 1

[titanandrews]

Hi,
I am using the sort() function from <algorithm> and trying to use a member function for the sort implementation.
Like this:

bool MyView::SortAsc(const string& x, const string& y)
{
   //do some sorting
   return true;
}

void MyView::MySortCaller()
{
   vector<string> myVect;
  
   //Put some stuff in them
   sort(myVect.begin(),myVect.end(),SortAsc);
}

If I remove the SortAsc() function from the class, then it works fine i.e. (bool SortAsc(const string& x, const string& y), but this function must be a member function because I HAVE to access member variables. How can I make this function a member and reference it from the sort() function. I have tried

sort(myVect.begin(),myVect.end(),this->SortAsc); 
sort(myVect.begin(),myVect.end(),SortAsc); 
sort(myVect.begin(),myVect.end(),MyView::SortAsc);

Nothing works. I get compiler errors.

many thanks to you,


Barry

 

[palbano]

Yeah that's not going to work. Technically you can use a member function if it is static, but then of course you won’t have access to members so it does not solve your problem.

You might consider using a Singleton object to access from within the sort function. Also make sure your design makes sense. Generally data other than the objects being sorted is not needed in a sort function.


-pete

 

[titanandrews]

&quot;Generally data other than the objects being sorted is not needed in a sort function.&quot;

Yes, I agree. But this is a bizarre circumstance, believe me. The Singleton may work. Thank you!


Barry