From 66f056776f1220ede1aa5cbfe058b88d6df3e359 Mon Sep 17 00:00:00 2001
From: Eugene Zhulenev <ezhulenev@google.com>
Date: Sat, 15 Sep 2018 15:17:38 -0700
Subject: Add DSizes index type promotion

---
 unsupported/test/cxx11_tensor_dimension.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'unsupported/test/cxx11_tensor_dimension.cpp')

diff --git a/unsupported/test/cxx11_tensor_dimension.cpp b/unsupported/test/cxx11_tensor_dimension.cpp
index 10364d4b4..26f8edd8a 100644
--- a/unsupported/test/cxx11_tensor_dimension.cpp
+++ b/unsupported/test/cxx11_tensor_dimension.cpp
@@ -60,10 +60,28 @@ static void test_rank_zero()
   VERIFY_IS_EQUAL((int)dscalar.rank(), 0);
 }
 
+static void test_index_type_promotion() {
+#ifdef EIGEN_HAS_CXX11
+  Eigen::DSizes<int, 3> src0(1, 2, 3);
+  Eigen::array<int, 3> src1 = {4, 5, 6};
+
+  Eigen::DSizes<long, 3> dst0(src0);
+  Eigen::DSizes<long, 3> dst1(src1);
+
+  VERIFY_IS_EQUAL(dst0[0], 1L);
+  VERIFY_IS_EQUAL(dst0[1], 2L);
+  VERIFY_IS_EQUAL(dst0[2], 3L);
+  VERIFY_IS_EQUAL(dst1[0], 4L);
+  VERIFY_IS_EQUAL(dst1[1], 5L);
+  VERIFY_IS_EQUAL(dst1[2], 6L);
+#endif  // EIGEN_HAS_CXX11
+}
+
 EIGEN_DECLARE_TEST(cxx11_tensor_dimension)
 {
   CALL_SUBTEST(test_dynamic_size());
   CALL_SUBTEST(test_fixed_size());
   CALL_SUBTEST(test_match());
   CALL_SUBTEST(test_rank_zero());
+  CALL_SUBTEST(test_index_type_promotion());
 }
-- 
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