introduced virtual destructors

[[Imported from SVN: r2662]]

solver/common/iterationstep.hh

@@ -17,6 +17,9 @@ namespace Dune {
     //! Default constructor
     IterationStep() {}
 
+    /** \brief Destructor */
+    virtual ~IterationStep() {}
+
     //! Constructor being given linear operator, solution and right hand side
     IterationStep(const OperatorType& mat, DiscFuncType& x, DiscFuncType& rhs) {
       mat_ = &mat;
@@ -25,7 +28,7 @@ namespace Dune {
     }
 
     //! Set linear operator, solution and right hand side
-    void setProblem(const OperatorType& mat, DiscFuncType& x, DiscFuncType& rhs) {
+    virtual void setProblem(const OperatorType& mat, DiscFuncType& x, DiscFuncType& rhs) {
       x_   = &x;
       rhs_ = &rhs;
       mat_ = &mat;

solver/common/solver.hh

 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 // vi: set et ts=4 sw=2 sts=2:
-#ifndef __DUNE_SOLVER_HH__
-#define __DUNE_SOLVER_HH__
+#ifndef DUNE_SOLVER_HH
+#define DUNE_SOLVER_HH
 
 #include <dune/solver/common/numproc.hh>
 
@@ -12,6 +12,9 @@ namespace Dune {
   {
   public:
 
+    /** \brief Virtual destructor */
+    virtual ~Solver() {}
+
     /** \brief Do the necessary preprocessing */
     virtual void preprocess();