From b178cc347968675bdae942dbdcb7de9ed9daa564 Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Wed, 21 Oct 2015 11:28:28 -0700
Subject: Added some syntactic sugar to make it simpler to compare a tensor to
 a scalar.

---
 unsupported/test/cxx11_tensor_sugar.cpp | 38 +++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 unsupported/test/cxx11_tensor_sugar.cpp

(limited to 'unsupported/test/cxx11_tensor_sugar.cpp')

diff --git a/unsupported/test/cxx11_tensor_sugar.cpp b/unsupported/test/cxx11_tensor_sugar.cpp
new file mode 100644
index 000000000..7848acc8b
--- /dev/null
+++ b/unsupported/test/cxx11_tensor_sugar.cpp
@@ -0,0 +1,38 @@
+#include "main.h"
+
+#include <Eigen/CXX11/Tensor>
+
+using Eigen::Tensor;
+using Eigen::RowMajor;
+
+static void test_comparison_sugar() {
+  // we already trust comparisons between tensors, we're simply checking that
+  // the sugared versions are doing the same thing
+  Tensor<int, 3> t(6, 7, 5);
+
+  t.setRandom();
+  // make sure we have at least one value == 0
+  t(0,0,0) = 0;
+
+  Tensor<bool,1> b;
+
+#define TEST_TENSOR_EQUAL(e1, e2) \
+  b = ((e1) == (e2)).all();       \
+  VERIFY(b(0))
+
+#define TEST_OP(op) TEST_TENSOR_EQUAL(t op 0, t op t.constant(0))
+
+  TEST_OP(==);
+  TEST_OP(!=);
+  TEST_OP(<=);
+  TEST_OP(>=);
+  TEST_OP(<);
+  TEST_OP(>);
+#undef TEST_OP
+#undef TEST_TENSOR_EQUAL
+}
+
+void test_cxx11_tensor_sugar()
+{
+  CALL_SUBTEST(test_comparison_sugar());
+}
-- 
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