1 files changed, 43 insertions, 0 deletions
diff --git a/libcxx/test/std/numerics/numarray/template.slice.array/slice.arr.comp.assign/addition.pass.cpp b/libcxx/test/std/numerics/numarray/template.slice.array/slice.arr.comp.assign/addition.pass.cpp
new file mode 100644
index 00000000000..8b5bf75d414
--- /dev/null
+++ b/libcxx/test/std/numerics/numarray/template.slice.array/slice.arr.comp.assign/addition.pass.cpp
@@ -0,0 +1,43 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <valarray>
+
+// template <class T> class slice_array
+
+// void operator+= (const valarray<value_type>& v) const;
+
+#include <valarray>
+#include <cassert>
+
+int main()
+{
+    int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
+    int a2[] = {-1, -2, -3, -4, -5};
+    std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
+    std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
+    v1[std::slice(1, 5, 3)] += v2;
+    assert(v1.size() == 16);
+    assert(v1[ 0] ==  0);
+    assert(v1[ 1] ==  0);
+    assert(v1[ 2] ==  2);
+    assert(v1[ 3] ==  3);
+    assert(v1[ 4] ==  2);
+    assert(v1[ 5] ==  5);
+    assert(v1[ 6] ==  6);
+    assert(v1[ 7] ==  4);
+    assert(v1[ 8] ==  8);
+    assert(v1[ 9] ==  9);
+    assert(v1[10] ==  6);
+    assert(v1[11] == 11);
+    assert(v1[12] == 12);
+    assert(v1[13] ==  8);
+    assert(v1[14] == 14);
+    assert(v1[15] == 15);
+}