1 files changed, 51 insertions, 0 deletions
diff --git a/libcxx/test/libcxx-03/numerics/numarray/class.mask.array/get.pass.cpp b/libcxx/test/libcxx-03/numerics/numarray/class.mask.array/get.pass.cpp
new file mode 100644
index 000000000000..e34c38289222
--- /dev/null
+++ b/libcxx/test/libcxx-03/numerics/numarray/class.mask.array/get.pass.cpp
@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// <valarray>
+
+// template<class T> class mask_array;
+
+// T __get(size_t i);
+
+#include <valarray>
+#include <cassert>
+
+#include "test_macros.h"
+
+int main(int, char**) {
+  unsigned input[] = {0, 1, 2, 3, 4};
+  const unsigned N = sizeof(input) / sizeof(input[0]);
+
+  std::valarray<unsigned> array(input, N);
+
+  {
+    std::mask_array<unsigned> result = array[std::valarray<bool>(true, N)];
+    for (unsigned i = 0; i < N; ++i)
+      assert(result.__get(i) == i);
+  }
+
+  {
+    std::valarray<bool> mask(false, N);
+    mask[1]                          = true;
+    mask[3]                          = true;
+    std::mask_array<unsigned> result = array[mask];
+    assert(result.__get(0) == 1);
+    assert(result.__get(1) == 3);
+  }
+
+  {
+    std::valarray<bool> mask(false, N);
+    mask[0]                          = true;
+    mask[4]                          = true;
+    std::mask_array<unsigned> result = array[mask];
+    assert(result.__get(0) == 0);
+    assert(result.__get(1) == 4);
+  }
+
+  return 0;
+}