1 files changed, 9 insertions, 9 deletions

diff --git a/impl/Expression.hpp b/impl/Expression.hpp
index 9c4ac9f..c005fd6 100644
--- a/impl/Expression.hpp
+++ b/impl/Expression.hpp
@@ -31,9 +31,9 @@ struct Expression {
     return NULL;
   }
 
-  virtual Domain eval(const VariableAssignment<Domain>&) const = 0;
-  virtual Domain eval(const VariableAssignment<Domain>& rho,
-                      const MaxStrategy<Domain>&) const {
+  virtual Domain eval(VariableAssignment<Domain>&) const = 0;
+  virtual Domain eval(VariableAssignment<Domain>& rho,
+                      MaxStrategy<Domain>&) const {
     return eval(rho);
   }
 
@@ -48,7 +48,7 @@ struct Constant : public Expression<Domain> {
   Constant(const Domain& value)
     : _value(value) { }
 
-  virtual Domain eval(const VariableAssignment<Domain>&) const {
+  virtual Domain eval(VariableAssignment<Domain>&) const {
     return _value;
   }
 
@@ -72,7 +72,7 @@ struct Variable : public Expression<Domain> {
     return _name;
   }
 
-  virtual Domain eval(const VariableAssignment<Domain>& rho) const {
+  virtual Domain eval(VariableAssignment<Domain>& rho) const {
     return rho[*this];
   }
 
@@ -90,7 +90,7 @@ struct OperatorExpression : public Expression<Domain> {
   OperatorExpression(const Operator<Domain>& op, const std::vector<Expression<Domain>*>& arguments)
     : _operator(op), _arguments(arguments) { }
 
-  virtual Domain eval(const VariableAssignment<Domain>& rho) const {
+  virtual Domain eval(VariableAssignment<Domain>& rho) const {
     std::vector<Domain> argumentValues;
     for (typename std::vector<Expression<Domain>*>::const_iterator it = _arguments.begin();
          it != _arguments.end();
@@ -100,7 +100,7 @@ struct OperatorExpression : public Expression<Domain> {
     return _operator.eval(argumentValues);
   }
 
-  virtual Domain eval(const VariableAssignment<Domain>& rho, const MaxStrategy<Domain>& strat) const {
+  virtual Domain eval(VariableAssignment<Domain>& rho, MaxStrategy<Domain>& strat) const {
     std::vector<Domain> argumentValues;
     for (typename std::vector<Expression<Domain>*>::const_iterator it = _arguments.begin();
          it != _arguments.end();
@@ -161,11 +161,11 @@ struct MaxExpression : public OperatorExpression<Domain> {
     return this;
   }
 
-  virtual Domain eval(const VariableAssignment<Domain>& rho, const MaxStrategy<Domain>& strat) const {
+  virtual Domain eval(VariableAssignment<Domain>& rho, MaxStrategy<Domain>& strat) const {
     return this->_arguments[strat.get(*this)]->eval(rho, strat);
   }
 
-  unsigned int bestStrategy(const VariableAssignment<Domain>& rho, const MaxStrategy<Domain>& strat) const {
+  unsigned int bestStrategy(VariableAssignment<Domain>& rho, MaxStrategy<Domain>& strat) const {
     Domain bestValue = this->eval(rho, strat);
     unsigned int bestIndex = strat.get(*this);