From f15dab935a86f82f423c7619c1977273ff50b3bb Mon Sep 17 00:00:00 2001
From: Justin Carpentier <justin.carpentier@inria.fr>
Date: Mon, 24 Aug 2020 19:52:32 +0200
Subject: [PATCH] test: test to-python for Eigen::Ref

---
 unittest/eigen_ref.cpp            | 10 ++++++++++
 unittest/python/test_eigen_ref.py | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/unittest/eigen_ref.cpp b/unittest/eigen_ref.cpp
index 1e58cfee..267f4a00 100644
--- a/unittest/eigen_ref.cpp
+++ b/unittest/eigen_ref.cpp
@@ -37,6 +37,14 @@ void fill(Eigen::Ref<MatType> mat, const typename MatType::Scalar & value)
   mat.fill(value);
 }
 
+template<typename MatType>
+Eigen::Ref<MatType> asRef(const int rows, const int cols)
+{
+  static MatType mat(rows,cols);
+  std::cout << "mat:\n" << mat << std::endl;
+  return mat;
+}
+
 BOOST_PYTHON_MODULE(eigen_ref)
 {
   namespace bp = boost::python;
@@ -56,4 +64,6 @@ BOOST_PYTHON_MODULE(eigen_ref)
   bp::def("fillVec3", fill<Vector3d>);
   bp::def("fillVec", fill<VectorXd>);
   bp::def("fill", fill<MatrixXd>);
+  
+  bp::def("asRef", asRef<MatrixXd>);
 }
diff --git a/unittest/python/test_eigen_ref.py b/unittest/python/test_eigen_ref.py
index fe8cd29e..76721a3f 100644
--- a/unittest/python/test_eigen_ref.py
+++ b/unittest/python/test_eigen_ref.py
@@ -8,6 +8,16 @@ def test(mat):
   printMatrix(mat)
   assert np.array_equal(mat,np.full(mat.shape,1.))
 
+  A_ref = asRef(mat.shape[0],mat.shape[1])
+  A_ref.fill(1.)
+  A_ref2 = asRef(mat.shape[0],mat.shape[1])
+
+  assert np.array_equal(A_ref,A_ref2)
+
+  A_ref2.fill(0)
+  assert np.array_equal(A_ref,A_ref2)
+  
+
 rows = 10
 cols = 30
 
-- 
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