From 35f7829af10c61e33dd2e2a7a015058e11a11ea0 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Sat, 25 Mar 2017 14:17:07 +0100
Subject: update

---
 eigen/doc/examples/make_circulant.cpp.expression | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 eigen/doc/examples/make_circulant.cpp.expression

(limited to 'eigen/doc/examples/make_circulant.cpp.expression')

diff --git a/eigen/doc/examples/make_circulant.cpp.expression b/eigen/doc/examples/make_circulant.cpp.expression
new file mode 100644
index 0000000..380cd44
--- /dev/null
+++ b/eigen/doc/examples/make_circulant.cpp.expression
@@ -0,0 +1,20 @@
+template <class ArgType>
+class Circulant : public Eigen::MatrixBase<Circulant<ArgType> >
+{
+public:
+  Circulant(const ArgType& arg)
+    : m_arg(arg)
+  { 
+    EIGEN_STATIC_ASSERT(ArgType::ColsAtCompileTime == 1,
+                        YOU_TRIED_CALLING_A_VECTOR_METHOD_ON_A_MATRIX);
+  }
+
+  typedef typename Eigen::internal::ref_selector<Circulant>::type Nested; 
+
+  typedef Eigen::Index Index;
+  Index rows() const { return m_arg.rows(); }
+  Index cols() const { return m_arg.rows(); }
+
+  typedef typename Eigen::internal::ref_selector<ArgType>::type ArgTypeNested;
+  ArgTypeNested m_arg;
+};
-- 
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