Re: [boost] Weird behaviour/bug in ptr_map

From: Thomas Witt (witt_at_[hidden])
Date: 2007-01-02 11:26:52

Joshua Moore-Oliva wrote:
> Sorry if you get this twice, it didn't post for me on the first try.
> 
> I was doing what I do regularly with std::maps...  a 
> m_plsts.erase( m_plsts.begin(), m_plsts.end() ); on a boost::ptr_map.  It 
> failed with an assertion error...  Digging around, it came from 
> ptr_container/detail/associative_ptr_container.hpp on line 117.  It appears 
> that every single erase (including that done by a key) has an assert for the 
> map not being empty!

Help me out here. The example does not work for m_plsts.empty() ?

> 
> Why is this the case?  As far as I understand, it is valid to attempt to 
> remove a key that does not exist.  It follows that the same behaviour would 
> occur whether the map was empty or not.  Attempting to remove an element from 
> an empty map should not result in an abort.

Sorry but how is this related to the above example?

Thomas

-- 
Thomas Witt
witt_at_[hidden]