From 7eefb6424831f18a09b533f82596b5fe61867683 Mon Sep 17 00:00:00 2001
From: Max Kahnt <max.kahnt@fu-berlin.de>
Date: Thu, 28 Sep 2017 15:32:26 +0200
Subject: [PATCH] Add sparseRangeFirst hybrid applicator.
---
dune/matrix-vector/algorithm.hh | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/dune/matrix-vector/algorithm.hh b/dune/matrix-vector/algorithm.hh
index 526b542..5a1c710 100644
--- a/dune/matrix-vector/algorithm.hh
+++ b/dune/matrix-vector/algorithm.hh
@@ -36,7 +36,17 @@ void sparseRangeFor(Range&& range, F&& f)
f(*it, it.index());
}
-
+//! \brief Hybrid access to first sparse range element (static/tuple-like candiate)
+template <class Range, class F, std::enable_if_t<isTupleOrDerived<Range>(), int> = 0>
+void sparseRangeFirst(Range&& range, F&& f) {
+ f(range[Indices::_0]);
+}
+//! \brief Hybrid access to first sparse range element (dynamic/sparse candiate)
+template<class Range, class F, std::enable_if_t<not isTupleOrDerived<Range>(), int> = 0>
+void sparseRangeFirst(Range&& range, F&& f)
+{
+ f(*range.begin());
+}
} // namespace MatrixVector
} // namespace Dune
--
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