Fix const version of getVar

Author: hedtke

include/scippp/var.hpp

@@ -34,7 +34,7 @@ struct Var {
      * @since 1.3.0
      * @return underlying %SCIP variable.
      */
-    [[nodiscard]] const SCIP_Var* getVar() const;
+    [[nodiscard]] SCIP_Var* const getVar() const;
 
     /**
      * Get the assigned value in the solution.

source/model.cpp

@@ -79,7 +79,7 @@ void Model::addConstr(const scippp::LinIneq& ineq, const std::string& name)
         ineq.m_lhs, /* left hand side of constraint */
         ineq.m_rhs.has_value() ? ineq.m_rhs.value() : infinity()));
     for (size_t index { 0 }; index < ineq.m_linExpr.m_vars.size(); index++) {
-        m_scipCallWrapper(SCIPaddCoefLinear(m_scip, con, ineq.m_linExpr.m_vars.at(index).var, ineq.m_linExpr.m_coeffs.at(index)));
+        m_scipCallWrapper(SCIPaddCoefLinear(m_scip, con, ineq.m_linExpr.m_vars.at(index).getVar(), ineq.m_linExpr.m_coeffs.at(index)));
     }
     m_scipCallWrapper(SCIPaddCons(m_scip, con));
     m_cons.push_back(con);

source/var.cpp

@@ -12,7 +12,7 @@ SCIP_Var* Var::getVar()
     return var;
 }
 
-const SCIP_Var* Var::getVar() const
+SCIP_Var* const Var::getVar() const
 {
     return var;
 }