Make std::get constexpr
llvm-svn: 186525
diff --git a/libcxx/test/containers/sequences/array/indexing.pass.cpp b/libcxx/test/containers/sequences/array/indexing.pass.cpp
new file mode 100644
index 0000000..e4dda0d
--- /dev/null
+++ b/libcxx/test/containers/sequences/array/indexing.pass.cpp
@@ -0,0 +1,60 @@
+//===----------------------------------------------------------------------===//
+//
+// 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[0];
+ assert(r1 == 1);
+ r1 = 5.5;
+ assert(c.front() == 5.5);
+
+ C::reference r2 = c[2];
+ assert(r2 == 3.5);
+ r2 = 7.5;
+ assert(c.back() == 7.5);
+ }
+ {
+ typedef double T;
+ typedef std::array<T, 3> C;
+ const C c = {1, 2, 3.5};
+ C::const_reference r1 = c[0];
+ assert(r1 == 1);
+ C::const_reference r2 = c[2];
+ assert(r2 == 3.5);
+ }
+
+#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[0];
+ static_assert (t1 == 1, "");
+
+ constexpr T t2 = c[2];
+ static_assert (t2 == 3.5, "");
+ }
+#endif
+
+}