AIMA.Core.Search.CSP.ImprovedBacktrackingStrategy.doForwardChecking C# (CSharp) Method

        private DomainRestoreInfo doForwardChecking(Variable var,
                Assignment assignment, CSP csp)
        {
            DomainRestoreInfo result = new DomainRestoreInfo();
            foreach (Constraint constraint in csp.getConstraints(var))
            {
                List<Variable> scope = constraint.getScope();
                if (scope.Count == 2)
                {
                    foreach (Variable neighbor in constraint.getScope())
                    {
                        if (!assignment.hasAssignmentFor(neighbor))
                        {
                            if (revise(neighbor, constraint, assignment, csp,
                                    result))
                            {
                                if (csp.getDomain(neighbor).isEmpty())
                                {
                                    result.setEmptyDomainFound(true);
                                    return result;
                                }
                            }
                        }
                    }
                }
            }
            return result;
        }