vendor/libc++/libc++-release_370-r246257

1 files changed, 89 insertions, 0 deletions

diff --git a/test/std/numerics/numarray/template.valarray/valarray.members/swap.pass.cpp b/test/std/numerics/numarray/template.valarray/valarray.members/swap.pass.cpp
new file mode 100644
index 000000000000..a90a80936376
--- /dev/null
+++ b/test/std/numerics/numarray/template.valarray/valarray.members/swap.pass.cpp
@@ -0,0 +1,89 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 valarray;
+
+// void swap(valarray& v);
+
+#include <valarray>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef int T;
+        T a1[] = {1, 2, 3, 4, 5};
+        T a2[] = {6, 7, 8, 9, 10, 11, 12};
+        const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
+        const unsigned N2 = sizeof(a2)/sizeof(a2[0]);
+        std::valarray<T> v1(a1, N1);
+        std::valarray<T> v2(a2, N2);
+        std::valarray<T> v1_save = v1;
+        std::valarray<T> v2_save = v2;
+        v1.swap(v2);
+        assert(v1.size() == v2_save.size());
+        for (int i = 0; i < v1.size(); ++i)
+            assert(v1[i] == v2_save[i]);
+        assert(v2.size() == v1_save.size());
+        for (int i = 0; i < v2.size(); ++i)
+            assert(v2[i] == v1_save[i]);
+    }
+    {
+        typedef int T;
+        T a1[] = {1, 2, 3, 4, 5};
+        const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
+        const unsigned N2 = 0;
+        std::valarray<T> v1(a1, N1);
+        std::valarray<T> v2;
+        std::valarray<T> v1_save = v1;
+        std::valarray<T> v2_save = v2;
+        v1.swap(v2);
+        assert(v1.size() == v2_save.size());
+        for (int i = 0; i < v1.size(); ++i)
+            assert(v1[i] == v2_save[i]);
+        assert(v2.size() == v1_save.size());
+        for (int i = 0; i < v2.size(); ++i)
+            assert(v2[i] == v1_save[i]);
+    }
+    {
+        typedef int T;
+        T a2[] = {6, 7, 8, 9, 10, 11, 12};
+        const unsigned N1 = 0;
+        const unsigned N2 = sizeof(a2)/sizeof(a2[0]);
+        std::valarray<T> v1;
+        std::valarray<T> v2(a2, N2);
+        std::valarray<T> v1_save = v1;
+        std::valarray<T> v2_save = v2;
+        v1.swap(v2);
+        assert(v1.size() == v2_save.size());
+        for (int i = 0; i < v1.size(); ++i)
+            assert(v1[i] == v2_save[i]);
+        assert(v2.size() == v1_save.size());
+        for (int i = 0; i < v2.size(); ++i)
+            assert(v2[i] == v1_save[i]);
+    }
+    {
+        typedef int T;
+        const unsigned N1 = 0;
+        const unsigned N2 = 0;
+        std::valarray<T> v1;
+        std::valarray<T> v2;
+        std::valarray<T> v1_save = v1;
+        std::valarray<T> v2_save = v2;
+        v1.swap(v2);
+        assert(v1.size() == v2_save.size());
+        for (int i = 0; i < v1.size(); ++i)
+            assert(v1[i] == v2_save[i]);
+        assert(v2.size() == v1_save.size());
+        for (int i = 0; i < v2.size(); ++i)
+            assert(v2[i] == v1_save[i]);
+    }
+}