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

1 files changed, 67 insertions, 0 deletions

diff --git a/test/std/containers/sequences/array/at.pass.cpp b/test/std/containers/sequences/array/at.pass.cpp
new file mode 100644
index 000000000000..b5cf8a5aaa8f
--- /dev/null
+++ b/test/std/containers/sequences/array/at.pass.cpp
@@ -0,0 +1,67 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <array>
+
+// reference operator[] (size_type)
+// const_reference operator[] (size_type); // constexpr in C++14
+// reference at (size_type)
+// const_reference at (size_type); // constexpr in C++14
+
+#include <array>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef double T;
+        typedef std::array<T, 3> C;
+        C c = {1, 2, 3.5};
+        C::reference r1 = c.at(0);
+        assert(r1 == 1);
+        r1 = 5.5;
+        assert(c.front() == 5.5);
+        
+        C::reference r2 = c.at(2);
+        assert(r2 == 3.5);
+        r2 = 7.5;
+        assert(c.back() == 7.5);
+
+        try { (void) c.at(3); }
+        catch (const std::out_of_range &) {}
+    }
+    {
+        typedef double T;
+        typedef std::array<T, 3> C;
+        const C c = {1, 2, 3.5};
+        C::const_reference r1 = c.at(0);
+        assert(r1 == 1);
+        
+        C::const_reference r2 = c.at(2);
+        assert(r2 == 3.5);
+
+        try { (void) c.at(3); }
+        catch (const std::out_of_range &) {}
+    }
+    
+#if _LIBCPP_STD_VER > 11 
+    {
+        typedef double T;
+        typedef std::array<T, 3> C;
+        constexpr C c = {1, 2, 3.5};
+
+        constexpr T t1 = c.at(0);
+        static_assert (t1 == 1, "");
+
+        constexpr T t2 = c.at(2);
+        static_assert (t2 == 3.5, "");
+    }
+#endif
+
+}