On 01/24/2005 04:04 AM, Pavel Vozenilek wrote: [snip]
The problem is what syntax to use to define Multiton, like:
template < typename T, typename Parameters = TYPELIST2(std::string, std::string), typename Lifetime = ...
class Multiton { .... };
and how to 'generate' flat structure from the typelist. (The structure would be then used as key in lookup map.)
Use: reverse_fold<Parameters,empty_base,SingletonNode> described here: http://www.boost.org/libs/mpl/doc/refmanual/reverse-fold.html as a superclass of Multiton. The instantiations of last argument would define the singleton's for the various elements in the typelist while inheriting the succeeding ones in the typelist. Accessing the ith-singleton can be done with the code in: get_side_type.zip in http://boost-sandbox.sourceforge.net/vault/ . The code in get_ith_head_test.cpp can be used as a model for making a get<i> member function for accessing the i-th singleton. HTH. Regards, Larry