From 407ab86d45decfbbdb67fe23e5945a0ff11cd469 Mon Sep 17 00:00:00 2001
From: Max Kahnt <max.kahnt@fu-berlin.de>
Date: Sat, 30 Sep 2017 15:02:32 +0200
Subject: [PATCH] Add concepts.
---
dune/matrix-vector/concepts.hh | 37 ++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 dune/matrix-vector/concepts.hh
diff --git a/dune/matrix-vector/concepts.hh b/dune/matrix-vector/concepts.hh
new file mode 100644
index 0000000..c854388
--- /dev/null
+++ b/dune/matrix-vector/concepts.hh
@@ -0,0 +1,37 @@
+#ifndef DUNE_MATRIX_VECTOR_CONCEPTS_HH
+#define DUNE_MATRIX_VECTOR_CONCEPTS_HH
+
+// though not needed for this file, checking
+// for a concept requires this include anyway
+#include <dune/common/concept.hh>
+
+namespace Dune {
+namespace MatrixVector {
+namespace Concept {
+
+struct HasBegin {
+ template <class C>
+ auto require(C&& c) -> decltype(c.begin());
+};
+
+
+struct HasN {
+ template <class C>
+ auto require(C&& c) -> decltype(c.N());
+};
+
+struct HasResize {
+ template <class C>
+ auto require(C&& c) -> decltype(c.resize(0));
+};
+
+struct HasSize {
+ template <class C>
+ auto require(C&& c) -> decltype(c.size());
+};
+
+} // end namespace Concept
+} // end namespace MatrixVector
+} // end namespace Dune
+
+#endif // DUNE_MATRIX_VECTOR_CONCEPTS_HH
--
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