libcxx initial import
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/strings/basic.string/string.access/back.pass.cpp b/test/strings/basic.string/string.access/back.pass.cpp
new file mode 100644
index 0000000..a4ce3ac
--- /dev/null
+++ b/test/strings/basic.string/string.access/back.pass.cpp
@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// const charT& back() const;
+// charT& back();
+
+#include <string>
+#include <cassert>
+
+template <class S>
+void
+test(S s)
+{
+ const S& cs = s;
+ assert(&cs.back() == &cs[cs.size()-1]);
+ assert(&s.back() == &s[cs.size()-1]);
+ s.back() = typename S::value_type('z');
+ assert(s.back() == typename S::value_type('z'));
+}
+
+int main()
+{
+ typedef std::string S;
+ test(S("1"));
+ test(S("1234567890123456789012345678901234567890"));
+}