Move more classes into the Dune::Solvers namespace

LinearIterationStep
IterativeSolver
QuadraticIPOptSolver

Import them back into the global namespace, too, for backward
compatibility.

dune/solvers/iterationsteps/lineariterationstep.hh

@@ -14,6 +14,10 @@
 
 #include "iterationstep.hh"
 
+namespace Dune {
+
+namespace Solvers {
+
 //! Base class for iteration steps being called by an iterative linear solver
 template<class MatrixType, class VectorType, class BitVectorType = Dune::Solvers::DefaultBitVector_t<VectorType> >
 class LinearIterationStep : public IterationStep<VectorType, BitVectorType>,
@@ -89,4 +93,10 @@ private:
     using Base::setProblem;
 };
 
+}   // namespace Solvers
+}   // namespace Dune
+
+// For backward compatibility: will be removed eventually
+using Dune::Solvers::LinearIterationStep;
+
 #endif

dune/solvers/solvers/iterativesolver.hh

@@ -9,6 +9,10 @@
 #include <dune/solvers/iterationsteps/iterationstep.hh>
 #include <dune/solvers/norms/norm.hh>
 
+namespace Dune {
+
+  namespace Solvers {
+
     /** \brief Abstract base class for iterative solvers */
     template <class VectorType, class BitVectorType = Dune::BitSetVector<VectorType::block_type::dimension> >
     class IterativeSolver : public Solver
@@ -73,6 +77,13 @@
 
     };
 
+  }   // namespace Solvers
+
+}   // namespace Dune
+
+// For backward compatibility: will be removed eventually
+using Dune::Solvers::IterativeSolver;
+
 #include "iterativesolver.cc"
 
 #endif

dune/solvers/solvers/quadraticipopt.hh

@@ -27,6 +27,10 @@
 #include "IpIpoptApplication.hpp"
 #include "IpSolveStatistics.hpp"
 
+namespace Dune {
+
+namespace Solvers {
+
 /** \brief Implementation class used to pipe quadratic problems to
     the IPOpt interior-point solver
 
@@ -777,4 +781,11 @@ void QuadraticIPOptSolver<MatrixType,VectorType,JacobianType>::solve()
       DUNE_THROW(Dune::Exception, "IPOpt: Error during optimization!");
 }
 
+}   // namespace Solvers
+
+}   // namespace Dune
+
+// For backward compatibility: will be removed eventually
+using Dune::Solvers::QuadraticIPOptSolver;
+
 #endif