An extension of the simple AssignmentContext which is used by the
ConstraintWithContext class. The notification methods assigned and unassigned
are automatically called by the constraint whenever a variable of the constraint
is assigned or unassigned respectively.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 3 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not see http://www.gnu.org/licenses.