[boost] user defined facets in date_time library

From: Markus Schöpflin (markus.schoepflin_at_[hidden])
Date: 2004-08-30 06:25:51

While trying to make date_time tests compilable on tru64cxx65, I have come 
accross an issue with user defined facets (namely date_names_put and 
all_date_names_put) that leaves me scratching my head.

Is a user defined facet required to be default constructible? Or does it 
need a constructor of the form "foo(size_t refs = 0) : locale::facet(refs) {}"?

[lib.facets.examples] doesn't say so but most examples I could find either 
have a default constructor or a constructor taking a reference count.

Markus