Re: [Boost-users] [Unordered] size() != distance(begin(), end())

Subject: Re: [Boost-users] [Unordered] size() != distance(begin(), end())
From: Hossein Haeri (powerprogman_at_[hidden])
Date: 2010-09-14 06:52:52

Daniel,

> > container_[id].insert(v);
> 
> What's the full type of the unordered_map? As you seem to
> be inserting into the mapped value, is that right?

Yes. And, the full type is something like:

unordered_map<string, multimap<...> >

> > cout << "container insertion succesful" <<
> endl;
> > cout << "The container now contains "  <<
> container_.size() << " ids in it." << endl;
> > cout << "distance from begin to end = " <<
> distance(container_.begin(), container_.end()) <<
> endl;
> 
> Can you try changing that to
> 'std::distance(container_.begin(),
> container_.end())' to make sure that the correct function
> is called.

A few lines earlier I had written

using std::distance;

> It might be. Would it be possible to create a compilable
> demonstration of the issue? Or some more information on how you set up
> the container and what methods you have called?

In fact, I realised that that was a bug in my own code. I had a shared_ptr to container_ that was trying to destruct it earlier than it should have. Having the bug fixed though, I still think that this was a strange behaviour for the container should have failed to produce anything for any of the cout's above. I'll try to see if -- without the bug there -- I can still produce a minimalist demonstration to pass over. I'll let you know...

Cheers,
--Hossein