Re: [boost] Weird behaviour/bug in ptr_map

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2007-01-02 12:44:02

Thorsten Ottosen wrote:
> Joshua Moore-Oliva wrote:
> 
>>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 
>>list not being empty!
>

I could not see that assertion in the 1.34 RC branch? Are your examples 
from 1.33?

Here's the definition from 1.34:

         size_type erase( const key_type& x ) // nothrow
         {
             iterator i( this->c_private().find( x ) );  // nothrow
             if( i == this->end() )                      // nothrow
                 return 0u;                              // nothrow
             this->remove( i );                          // nothrow
             return this->c_private().erase( x );        // nothrow
         }

This works fine if the map is empty.

Wheter the overload that takes an iterator should be allowed to accept 
the end iterator is another issue. I'll give it some thought.

-Thorsten