@@ -96,6 +96,114 @@ function get_inner_constraint(com, vars::MOI.VectorOfVariables, set::Union{Reifi
9696 return init_constraint_struct (com, set. set, inner_internals)
9797end
9898
99+ """
100+ get_bool_constraint_fct_set(T, constraint::BoolConstraint, lhs_fct, lhs_set, rhs_fct, rhs_set)
101+
102+ Create the fct and set of a [`BoolConstraint`](@ref) which combines the left hand side with the right hand side.
103+ """
104+ function get_bool_constraint_fct_set (T, constraint:: BoolConstraint , lhs_fct, lhs_set, rhs_fct, rhs_set)
105+ BS = typeof_without_params (constraint. set)
106+ fct = MOIU. operate (vcat, T, lhs_fct, rhs_fct)
107+ set = BS {typeof(lhs_fct), typeof(rhs_fct)} (lhs_set, rhs_set)
108+ return fct, set
109+ end
110+
111+ function find_element_var_and_combine (T, constraint:: BoolConstraint , element_constraint, element_var)
112+ lhs = constraint. lhs
113+ rhs = constraint. rhs
114+ if element_var in lhs. indices
115+ if lhs isa BoolConstraint
116+ fct, set = find_element_var_and_combine (T, lhs, element_constraint, element_var)
117+ else
118+ fct = MOIU. operate (vcat, T, lhs. fct, element_constraint. fct)
119+ set = XNorSet {typeof(lhs.fct), typeof(element_constraint.fct)} (lhs. set, element_constraint. set)
120+ end
121+ fct, set = get_bool_constraint_fct_set (T, constraint, fct, set, rhs. fct, rhs. set)
122+ else
123+ if rhs isa BoolConstraint
124+ fct, set = find_element_var_and_combine (T, rhs, element_constraint, element_var)
125+ else
126+ fct = MOIU. operate (vcat, T, element_constraint. fct, rhs. fct)
127+ set = XNorSet {typeof(element_constraint.fct), typeof(rhs.fct)} (element_constraint. set, rhs. set)
128+ end
129+ fct, set = get_bool_constraint_fct_set (T, constraint, lhs. fct, lhs. set, fct, set)
130+ end
131+ return fct, set
132+ end
133+
134+ function create_new_activator_constraint (model, activation_constraint:: ActivatorConstraint , fct, set)
135+ com = model. inner
136+ T = parametric_type (com)
137+ ACS = typeof_without_params (activation_constraint. set)
138+ A = get_activation_condition (activation_constraint. set)
139+ if ACS == MOI. IndicatorSet
140+ ACS = IndicatorSet
141+ end
142+ f = MOIU. eachscalar (activation_constraint. fct)
143+
144+ activator_fct = f[1 ]
145+ fct = MOIU. operate (vcat, T, activator_fct, fct)
146+ MOI. add_constraint (model, fct, ACS {A,typeof(fct)} (set))
147+ end
148+
149+ """
150+ move_element_constraint(model)
151+
152+ If there are element constraints which are only used inside of an indicator or reified constraint
153+ => combine them with xnor and deactivate the previously added element constraint
154+ this is to avoid filtering based on this element constraint when the inner constraint isn't active
155+ For more see: https://github.com/Wikunia/ConstraintSolver.jl/pull/213#issuecomment-860954185
156+ """
157+ function move_element_constraint (model)
158+ com = model. inner
159+ T = parametric_type (com)
160+ constraints = com. constraints
161+ subscriptions = com. subscription
162+ for element_cons in constraints
163+ element_cons isa Element1DConstConstraint || continue
164+ element_var = element_cons. indices[1 ]
165+
166+ # check if the element var only appears in indicator or reified constraints
167+ only_inside = true
168+ for constraint in constraints[subscriptions[element_var]]
169+ # if not inside indicator, reified or OrConstraint and not the current constraint that we check
170+ if ! (constraint isa ActivatorConstraint) && ! (constraint isa OrConstraint) && constraint. idx != element_cons. idx
171+ only_inside = false
172+ end
173+ end
174+ ! only_inside && continue
175+ # check if at least once inside
176+ only_inside = false
177+ for constraint in constraints[subscriptions[element_var]]
178+ if constraint isa ActivatorConstraint || constraint isa OrConstraint
179+ only_inside = true
180+ break
181+ end
182+ end
183+ ! only_inside && continue
184+
185+ element_cons. is_deactivated = true
186+ for constraint in constraints[subscriptions[element_var]]
187+ constraint isa Element1DConstConstraint && continue
188+ constraint. is_deactivated && continue
189+ fct, set = nothing , nothing
190+ if constraint isa ActivatorConstraint
191+ if constraint. inner_constraint isa OrConstraint
192+ inner_constraint = constraint. inner_constraint
193+ fct, set = find_element_var_and_combine (T, inner_constraint, element_cons, element_var)
194+ else
195+ fct = MOIU. operate (vcat, T, constraint. inner_constraint. fct, element_cons. fct)
196+ set = XNorSet {typeof(constraint.inner_constraint.fct), typeof(element_cons.fct)} (constraint. inner_constraint. set, element_cons. set)
197+ end
198+ create_new_activator_constraint (model, constraint, fct, set)
199+ else # OrConstraint
200+ fct, set = find_element_var_and_combine (T, constraint, element_cons, element_var)
201+ MOI. add_constraint (model, fct, set)
202+ end
203+ end
204+ end
205+ end
206+
99207function get_activator_internals (A, indices)
100208 ActivatorConstraintInternals (A, indices[1 ] in indices[2 : end ], false , 0 )
101209end
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