test: Mark 316 tests as XFAIL to rename to xfail.pass.cpp.

test/input.output/iostream.format/input.streams/istream.rvalue/rvalue.xfail.pass.cpp

@@ -0,0 +1,63 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <istream>
+
+// template <class charT, class traits, class T>
+//   basic_istream<charT, traits>&
+//   operator>>(basic_istream<charT, traits>&& is, T& x);
+
+#include <istream>
+#include <cassert>
+
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+template <class CharT>
+struct testbuf
+    : public std::basic_streambuf<CharT>
+{
+    typedef std::basic_string<CharT> string_type;
+    typedef std::basic_streambuf<CharT> base;
+private:
+    string_type str_;
+public:
+
+    testbuf() {}
+    testbuf(const string_type& str)
+        : str_(str)
+    {
+        base::setg(const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()),
+                   const_cast<CharT*>(str_.data()) + str_.size());
+    }
+
+    CharT* eback() const {return base::eback();}
+    CharT* gptr() const {return base::gptr();}
+    CharT* egptr() const {return base::egptr();}
+};
+
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    {
+        testbuf<char> sb("   123");
+        int i = 0;
+        std::istream(&sb) >> i;
+        assert(i == 123);
+    }
+    {
+        testbuf<wchar_t> sb(L"   123");
+        int i = 0;
+        std::wistream(&sb) >> i;
+        assert(i == 123);
+    }
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+}