Protect c++11 type alias with Eigen's macro, and add respective unit test.

1 files changed, 43 insertions, 0 deletions

diff --git a/test/type_alias.cpp b/test/type_alias.cpp
new file mode 100644
index 000000000..f9b0efc5d
--- /dev/null
+++ b/test/type_alias.cpp
@@ -0,0 +1,43 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2019 Gael Guennebaud <gael.guennebaud@inria.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include "main.h"
+
+EIGEN_DECLARE_TEST(type_alias)
+{
+  using namespace internal;
+
+  // To warm up, some basic checks:
+  STATIC_CHECK((is_same<MatrixXd,Matrix<double,Dynamic,Dynamic> >::value));
+  STATIC_CHECK((is_same<Matrix2f,Matrix<float,2,2> >::value));
+  STATIC_CHECK((is_same<Array33i,Array<int,3,3> >::value));
+
+#if EIGEN_HAS_CXX11
+  
+  STATIC_CHECK((is_same<MatrixX<double>,    MatrixXd>::value));
+  STATIC_CHECK((is_same<MatrixX<int>,       MatrixXi>::value));
+  STATIC_CHECK((is_same<Matrix2<int>,       Matrix2i>::value));
+  STATIC_CHECK((is_same<Matrix2X<float>,    Matrix2Xf>::value));
+  STATIC_CHECK((is_same<MatrixX4<double>,   MatrixX4d>::value));
+  STATIC_CHECK((is_same<VectorX<int>,       VectorXi>::value));
+  STATIC_CHECK((is_same<Vector2<float>,     Vector2f>::value));
+  STATIC_CHECK((is_same<RowVectorX<int>,    RowVectorXi>::value));
+  STATIC_CHECK((is_same<RowVector2<float>,  RowVector2f>::value));
+  
+  STATIC_CHECK((is_same<ArrayXX<float>,     ArrayXXf>::value));
+  STATIC_CHECK((is_same<Array33<int>,       Array33i>::value));
+  STATIC_CHECK((is_same<Array2X<float>,     Array2Xf>::value));
+  STATIC_CHECK((is_same<ArrayX4<double>,    ArrayX4d>::value));
+  STATIC_CHECK((is_same<ArrayX<double>,     ArrayXd>::value));
+  STATIC_CHECK((is_same<Array4<double>,     Array4d>::value));
+
+#else
+  std::cerr << "WARNING: c++11 type aliases not tested.\n";
+#endif
+}