From 0870e6495aee63ee94463c1ac92c09581c60ab35 Mon Sep 17 00:00:00 2001
From: Andreas Dedner <dedner@dune-project.org>
Date: Sun, 22 Feb 2009 10:02:03 +0000
Subject: [PATCH] is used in dune-grid (alberta,alu, and
grid/dcommon/defaultindexsets.hh
[[Imported from SVN: r5444]]
---
common/interfaces.hh | 64 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
create mode 100644 common/interfaces.hh
diff --git a/common/interfaces.hh b/common/interfaces.hh
new file mode 100644
index 000000000..26710cbe7
--- /dev/null
+++ b/common/interfaces.hh
@@ -0,0 +1,64 @@
+// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+// vi: set et ts=4 sw=2 sts=2:
+#ifndef DUNE_INTERFACES_HH
+#define DUNE_INTERFACES_HH
+
+#include "typetraits.hh"
+
+/** @file
+ @author Robert Kloefkorn
+ @brief Provides a Interfaces for detection of specific behavior
+ */
+
+namespace Dune {
+
+ //! An interface class for cloneable objects
+ struct Cloneable {
+
+ /** \brief Clones the object
+ clone needs to be redefined by an implementation class, with the
+ return type covariantly adapted. Remember to
+ delete the resulting pointer.
+ */
+ virtual Cloneable* clone() const = 0;
+
+ /** \brief Destructor */
+ virtual ~Cloneable()
+ {}
+
+ };
+
+ //! Tagging interface to indicate that Grid provides typedef ObjectStreamType
+ struct HasObjectStream {};
+
+ //! Helper template (implicit specialisation if GridImp exports an object
+ //! stream
+ template <bool hasStream, class GridImp, class DefaultImp>
+ struct GridObjectStreamOrDefaultHelper {
+ typedef typename GridImp::ObjectStreamType ObjectStreamType;
+ };
+
+ //! Helper template (explicit specialisation if GridImp doesn't export an
+ //! object stream -> DefaultImplementation is exported)
+ template <class GridImp, class DefaultImp>
+ struct GridObjectStreamOrDefaultHelper<false, GridImp, DefaultImp> {
+ typedef DefaultImp ObjectStreamType;
+ };
+
+ //! Template to choose right Object stream type for a given class
+ template <class GridImp, class DefaultImp>
+ struct GridObjectStreamOrDefault {
+ typedef typename GridObjectStreamOrDefaultHelper<
+ Conversion<GridImp, HasObjectStream>::exists,
+ GridImp,
+ DefaultImp>::ObjectStreamType ObjectStreamType;
+ };
+
+ //! Tagging interface to indicate that class is of Type DofManager
+ struct IsDofManager {};
+
+ //! Tagging interface to indicate that Grid has HierarchicIndexSet
+ struct HasHierarchicIndexSet {};
+
+} // end namespace Dune
+#endif
--
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