| This constraint implements "OR" Boolean logic (checks that at least one
contained constraits is satisfied). It is eager by default, but can
be set to act lazily, (note that subconstraints produce error messages
as they are being validated, unless some custom error message has been set,
it makes often sense to process all subconstraints).
author: Jevgeni Kabanov (ekabanov at araneaframework dot org) |