Re: [Boost-users] ptr_container: ptr_map.insert() not compiling?

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2006-12-19 05:46:40

Duane Murphy wrote:
> I'm trying to use boost::ptr_map<> and cannot get calls insert to compile.
> 
> I'm on Mac OS X using gcc 3.3 with Xcode.
> 
> Even the most basic code fails to compile:
> 
> 	boost::ptr_map< in, int* > my_map;
> 	int * val = new int( 22 );
> 	my_map.insert( 1, val );

See http://www.boost.org/libs/ptr_container/doc/ptr_map_adapter.html

The first argument needs to be a reference:

int key = 1;
my_map.insert( key, new int(22) );

1.34 adds the followinf overload:

         template< class U >
         std::pair<iterator,bool>
         insert( const key_type& key, std::auto_ptr<U> x )

which does allow the key to be an rvalue (just don't create the auto_ptr 
in the function call).

HTH

-Thorsten