Add DefaultBitVector_t

The type alias DefaultBitVector_t<T> provides a default choice
for a bit vector that fits the structure of the vector type T.

dune/solvers/common/CMakeLists.txt

@@ -3,6 +3,7 @@ install(FILES
     arithmetic.hh
     boxconstraint.hh
     canignore.hh
+    defaultbitvector.hh
     genericvectortools.hh
     interval.hh
     numproc.hh

dune/solvers/common/defaultbitvector.hh

+// -*- tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+// vi: set et ts=8 sw=2 sts=2:
+#ifndef DUNE_SOLVERS_COMMON_DEFAULTBITVECTOR_HH
+#define DUNE_SOLVERS_COMMON_DEFAULTBITVECTOR_HH
+
+#include <dune/common/fvector.hh>
+
+#include <dune/istl/bvector.hh>
+
+namespace Dune {
+namespace Solvers {
+
+
+namespace Imp {
+
+template<class Vector>
+struct DefaultBitVector
+{
+  using type = void;
+};
+
+template<class T, class A>
+struct DefaultBitVector<BlockVector<T,A>>
+{
+  using type = typename std::vector<typename DefaultBitVector<T>::type>;
+};
+
+template<class T, class A>
+struct DefaultBitVector<std::vector<T,A>>
+{
+  using type = typename std::vector<typename DefaultBitVector<T>::type>;
+};
+
+template<class T, int i, class A>
+struct DefaultBitVector<BlockVector<FieldVector<T,i>, A>>
+{
+  using type = BitSetVector<i>;
+};
+
+} // end namespace Imp
+
+
+
+/**
+ * \brief Type alias for a bit vector that fits to T
+ *
+ * \tparam T A nested container type
+ *
+ * This alias provides a default choice of a bit vector
+ * that has the same nested structure as T.
+ */
+template<class T>
+using DefaultBitVector_t = typename Imp::DefaultBitVector<T>::type;
+
+
+
+} // end namespace Solvers
+} // end namespace Solvers
+
+
+
+#endif // DUNE_SOLVERS_COMMON_BITVECTOR_HH
+