On Fri, 05 Mar 2010 14:38:15 -0300
Agustín K-ballo Bergé
El 05/03/2010 06:31 a.m., Manfred Doudar escribió:
Hi,
Maybe I am misreading the documentation, but if I have an mpl::map and try and get an element associated with a key all's good, while if I assign a default - I get an error that mpl::at only takes 2 and not 3 template parameters.
Am I doing something blatantly wrong?
No. The mpl::at version that takes a default parameter does not exist. Documentation and source code are out of synch. When I need it I use this implementation:
typename boost::mpl::eval_if< typename boost::mpl::has_key< Map, Key >::type , boost::mpl::at< Map, Key > , boost::mpl::identity< Default >
::type
Agustín K-ballo Bergé.
Thank you Agustín for your reply, it's appreciated. --Manfred