Cleanup _LIBCPP_HAS_NO_<c++11-feature> in the input.output library

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@300626 91177308-0d34-0410-b5e6-96231b3b80d8

26 files changed, 96 insertions, 121 deletions

diff --git a/include/fstream b/include/fstream
index 7bcc5d450..5ec42bd13 100644
--- a/include/fstream
+++ b/include/fstream
@@ -193,13 +193,13 @@ public:
 
     // 27.9.1.2 Constructors/destructor:
     basic_filebuf();
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     basic_filebuf(basic_filebuf&& __rhs);
 #endif
     virtual ~basic_filebuf();
 
     // 27.9.1.3 Assign/swap:
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     basic_filebuf& operator=(basic_filebuf&& __rhs);
 #endif
@@ -276,7 +276,7 @@ basic_filebuf<_CharT, _Traits>::basic_filebuf()
     setbuf(0, 4096);
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs)
@@ -352,7 +352,7 @@ basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_filebuf<_CharT, _Traits>::~basic_filebuf()
@@ -1017,12 +1017,10 @@ public:
     _LIBCPP_INLINE_VISIBILITY
     explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in);
 #endif
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     basic_ifstream(basic_ifstream&& __rhs);
-#endif
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     _LIBCPP_INLINE_VISIBILITY
     basic_ifstream& operator=(basic_ifstream&& __rhs);
 #endif
@@ -1071,7 +1069,7 @@ basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::ope
 }
 #endif
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 inline
@@ -1092,7 +1090,7 @@ basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 inline
@@ -1177,12 +1175,10 @@ public:
     explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out);
     _LIBCPP_INLINE_VISIBILITY
     explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     basic_ofstream(basic_ofstream&& __rhs);
-#endif
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     _LIBCPP_INLINE_VISIBILITY
     basic_ofstream& operator=(basic_ofstream&& __rhs);
 #endif
@@ -1231,7 +1227,7 @@ basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::ope
 }
 #endif
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 inline
@@ -1252,7 +1248,7 @@ basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 inline
@@ -1339,12 +1335,10 @@ public:
     _LIBCPP_INLINE_VISIBILITY
     explicit basic_fstream(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
 #endif
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     basic_fstream(basic_fstream&& __rhs);
-#endif
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     _LIBCPP_INLINE_VISIBILITY
     basic_fstream& operator=(basic_fstream&& __rhs);
 #endif
@@ -1393,7 +1387,7 @@ basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openm
 }
 #endif
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 inline
@@ -1414,7 +1408,7 @@ basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 inline
diff --git a/include/istream b/include/istream
index 774f38df2..9a8bb44ef 100644
--- a/include/istream
+++ b/include/istream
@@ -189,12 +189,11 @@ public:
     { this->init(__sb); }
     virtual ~basic_istream();
 protected:
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     basic_istream(basic_istream&& __rhs);
-#endif
+
     // 27.7.1.1.2 Assign/swap:
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     inline _LIBCPP_INLINE_VISIBILITY
     basic_istream& operator=(basic_istream&& __rhs);
 #endif
@@ -332,7 +331,7 @@ basic_istream<_CharT, _Traits>::sentry::sentry(basic_istream<_CharT, _Traits>& _
         __is.setstate(ios_base::failbit);
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_istream<_CharT, _Traits>::basic_istream(basic_istream&& __rhs)
@@ -350,7 +349,7 @@ basic_istream<_CharT, _Traits>::operator=(basic_istream&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_istream<_CharT, _Traits>::~basic_istream()
@@ -1424,7 +1423,7 @@ ws(basic_istream<_CharT, _Traits>& __is)
     return __is;
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Tp>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1435,7 +1434,7 @@ operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp&& __x)
     return __is;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 class _LIBCPP_TEMPLATE_VIS basic_iostream
@@ -1458,13 +1457,11 @@ public:
 
     virtual ~basic_iostream();
 protected:
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     basic_iostream(basic_iostream&& __rhs);
-#endif
 
     // assign/swap
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     inline _LIBCPP_INLINE_VISIBILITY
     basic_iostream& operator=(basic_iostream&& __rhs);
 #endif
@@ -1474,7 +1471,7 @@ protected:
 public:
 };
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_iostream<_CharT, _Traits>::basic_iostream(basic_iostream&& __rhs)
@@ -1490,7 +1487,7 @@ basic_iostream<_CharT, _Traits>::operator=(basic_iostream&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_iostream<_CharT, _Traits>::~basic_iostream()
@@ -1607,7 +1604,7 @@ getline(basic_istream<_CharT, _Traits>& __is,
     return getline(__is, __str, __is.widen('\n'));
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template<class _CharT, class _Traits, class _Allocator>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1627,7 +1624,7 @@ getline(basic_istream<_CharT, _Traits>&& __is,
     return getline(__is, __str, __is.widen('\n'));
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, size_t _Size>
 basic_istream<_CharT, _Traits>&
diff --git a/include/ostream b/include/ostream
index 3d9be8b7a..ca2c83f74 100644
--- a/include/ostream
+++ b/include/ostream
@@ -165,13 +165,11 @@ public:
     { this->init(__sb); }
     virtual ~basic_ostream();
 protected:
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     basic_ostream(basic_ostream&& __rhs);
-#endif
 
     // 27.7.2.3 Assign/swap
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     inline _LIBCPP_INLINE_VISIBILITY
     basic_ostream& operator=(basic_ostream&& __rhs);
 #endif
@@ -290,7 +288,7 @@ basic_ostream<_CharT, _Traits>::sentry::~sentry()
     }
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_ostream<_CharT, _Traits>::basic_ostream(basic_ostream&& __rhs)
@@ -306,7 +304,7 @@ basic_ostream<_CharT, _Traits>::operator=(basic_ostream&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits>
 basic_ostream<_CharT, _Traits>::~basic_ostream()
@@ -1023,7 +1021,7 @@ flush(basic_ostream<_CharT, _Traits>& __os)
     return __os;
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _Stream, class _Tp>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1039,7 +1037,7 @@ operator<<(_Stream&& __os, const _Tp& __x)
     return _VSTD::move(__os);
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template<class _CharT, class _Traits, class _Allocator>
 basic_ostream<_CharT, _Traits>&
diff --git a/include/sstream b/include/sstream
index 40b97854f..411374207 100644
--- a/include/sstream
+++ b/include/sstream
@@ -212,12 +212,10 @@ public:
     inline _LIBCPP_INLINE_VISIBILITY
     explicit basic_stringbuf(const string_type& __s,
                              ios_base::openmode __wch = ios_base::in | ios_base::out);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     basic_stringbuf(basic_stringbuf&& __rhs);
-#endif
 
     // 27.8.1.2 Assign and swap:
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     basic_stringbuf& operator=(basic_stringbuf&& __rhs);
 #endif
     void swap(basic_stringbuf& __rhs);
@@ -255,7 +253,7 @@ basic_stringbuf<_CharT, _Traits, _Allocator>::basic_stringbuf(const string_type&
     str(__s);
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 basic_stringbuf<_CharT, _Traits, _Allocator>::basic_stringbuf(basic_stringbuf&& __rhs)
@@ -346,7 +344,7 @@ basic_stringbuf<_CharT, _Traits, _Allocator>::operator=(basic_stringbuf&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 void
@@ -641,13 +639,13 @@ public:
     inline _LIBCPP_INLINE_VISIBILITY
     explicit basic_istringstream(const string_type& __s,
                                  ios_base::openmode __wch = ios_base::in);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     basic_istringstream(basic_istringstream&& __rhs);
 
     // 27.8.2.2 Assign and swap:
     basic_istringstream& operator=(basic_istringstream&& __rhs);
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     void swap(basic_istringstream& __rhs);
 
@@ -675,7 +673,7 @@ basic_istringstream<_CharT, _Traits, _Allocator>::basic_istringstream(const stri
 {
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 basic_istringstream<_CharT, _Traits, _Allocator>::basic_istringstream(basic_istringstream&& __rhs)
@@ -694,7 +692,7 @@ basic_istringstream<_CharT, _Traits, _Allocator>::operator=(basic_istringstream&
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 void basic_istringstream<_CharT, _Traits, _Allocator>::swap(basic_istringstream& __rhs)
@@ -758,13 +756,13 @@ public:
     inline _LIBCPP_INLINE_VISIBILITY
     explicit basic_ostringstream(const string_type& __s,
                                  ios_base::openmode __wch = ios_base::out);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     basic_ostringstream(basic_ostringstream&& __rhs);
 
     // 27.8.2.2 Assign and swap:
     basic_ostringstream& operator=(basic_ostringstream&& __rhs);
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     void swap(basic_ostringstream& __rhs);
 
@@ -792,7 +790,7 @@ basic_ostringstream<_CharT, _Traits, _Allocator>::basic_ostringstream(const stri
 {
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 basic_ostringstream<_CharT, _Traits, _Allocator>::basic_ostringstream(basic_ostringstream&& __rhs)
@@ -811,7 +809,7 @@ basic_ostringstream<_CharT, _Traits, _Allocator>::operator=(basic_ostringstream&
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 void
@@ -877,13 +875,13 @@ public:
     inline _LIBCPP_INLINE_VISIBILITY
     explicit basic_stringstream(const string_type& __s,
                                 ios_base::openmode __wch = ios_base::in | ios_base::out);
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     basic_stringstream(basic_stringstream&& __rhs);
 
     // 27.8.2.2 Assign and swap:
     basic_stringstream& operator=(basic_stringstream&& __rhs);
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
     inline _LIBCPP_INLINE_VISIBILITY
     void swap(basic_stringstream& __rhs);
 
@@ -911,7 +909,7 @@ basic_stringstream<_CharT, _Traits, _Allocator>::basic_stringstream(const string
 {
 }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 basic_stringstream<_CharT, _Traits, _Allocator>::basic_stringstream(basic_stringstream&& __rhs)
@@ -930,7 +928,7 @@ basic_stringstream<_CharT, _Traits, _Allocator>::operator=(basic_stringstream&&
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 template <class _CharT, class _Traits, class _Allocator>
 void
diff --git a/include/strstream b/include/strstream
index 81eef2ab4..b00b9d830 100644
--- a/include/strstream
+++ b/include/strstream
@@ -151,12 +151,12 @@ public:
     strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg = 0);
     strstreambuf(const unsigned char* __gnext, streamsize __n);
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     strstreambuf(strstreambuf&& __rhs);
     _LIBCPP_INLINE_VISIBILITY
     strstreambuf& operator=(strstreambuf&& __rhs);
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
     virtual ~strstreambuf();
 
@@ -191,7 +191,7 @@ private:
     void __init(char* __gnext, streamsize __n, char* __pbeg);
 };
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
 
 inline _LIBCPP_INLINE_VISIBILITY
 strstreambuf::strstreambuf(strstreambuf&& __rhs)
@@ -226,7 +226,7 @@ strstreambuf::operator=(strstreambuf&& __rhs)
     return *this;
 }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
 class _LIBCPP_TYPE_VIS istrstream
     : public istream
@@ -245,7 +245,7 @@ public:
     istrstream(char* __s, streamsize __n)
         : istream(&__sb_), __sb_(__s, __n) {}
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     istrstream(istrstream&& __rhs)
         : istream(_VSTD::move(__rhs)),
@@ -261,7 +261,7 @@ public:
         __sb_ = _VSTD::move(__rhs.__sb_);
         return *this;
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
     virtual ~istrstream();
 
@@ -294,7 +294,7 @@ public:
           __sb_(__s, __n, __s + (__mode & ios::app ? strlen(__s) : 0))
         {}
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     ostrstream(ostrstream&& __rhs)
         : ostream(_VSTD::move(__rhs)),
@@ -310,7 +310,7 @@ public:
         __sb_ = _VSTD::move(__rhs.__sb_);
         return *this;
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
     virtual ~ostrstream();
 
@@ -354,7 +354,7 @@ public:
           __sb_(__s, __n, __s + (__mode & ios::app ? strlen(__s) : 0))
         {}
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#ifndef _LIBCPP_CXX03_LANG
     _LIBCPP_INLINE_VISIBILITY
     strstream(strstream&& __rhs)
         : iostream(_VSTD::move(__rhs)),
@@ -370,7 +370,7 @@ public:
         __sb_ = _VSTD::move(__rhs.__sb_);
         return *this;
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+#endif  // _LIBCPP_CXX03_LANG
 
     virtual ~strstream();
 
diff --git a/test/std/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp b/test/std/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp
index a92ec872a..66409543f 100644
--- a/test/std/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -20,7 +22,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::string temp = get_temp_file_name();
     {
         std::filebuf f;
@@ -52,5 +53,4 @@ int main()
         assert(f2.sgetc() == L'2');
     }
     std::remove(temp.c_str());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp
index f13ee4470..96806fbfe 100644
--- a/test/std/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -20,7 +22,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::string temp = get_temp_file_name();
     {
         std::filebuf f;
@@ -50,5 +51,4 @@ int main()
         assert(f2.sgetc() == L'2');
     }
     std::remove(temp.c_str());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp b/test/std/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
index b5157e90e..b143bd4a5 100644
--- a/test/std/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -20,7 +22,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::string temp = get_temp_file_name();
     {
         std::fstream fso(temp.c_str(), std::ios_base::in | std::ios_base::out
@@ -46,5 +47,4 @@ int main()
         assert(x == 3.25);
     }
     std::remove(temp.c_str());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
index d2ae30286..556cc858a 100644
--- a/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -20,7 +22,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::string temp = get_temp_file_name();
     {
         std::fstream fso(temp, std::ios_base::in | std::ios_base::out
@@ -44,5 +45,4 @@ int main()
         assert(x == 3.25);
     }
     std::remove(temp.c_str());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/ifstream.assign/move_assign.pass.cpp b/test/std/input.output/file.streams/fstreams/ifstream.assign/move_assign.pass.cpp
index 9c2fcad33..36fa29a4e 100644
--- a/test/std/input.output/file.streams/fstreams/ifstream.assign/move_assign.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ifstream.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::ifstream fso("test.dat");
         std::ifstream fs;
@@ -36,5 +37,4 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp
index aaac12122..eeb06e0e5 100644
--- a/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::ifstream fso("test.dat");
         std::ifstream fs = move(fso);
@@ -34,5 +35,4 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp b/test/std/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp
index 0f21eb81d..094f55073 100644
--- a/test/std/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -20,7 +22,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::string temp = get_temp_file_name();
     {
         std::ofstream fso(temp.c_str());
@@ -48,5 +49,4 @@ int main()
         assert(x == 3.25);
     }
     std::remove(temp.c_str());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
index 8645358cb..fe885cf40 100644
--- a/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -20,7 +22,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::string temp = get_temp_file_name();
     {
         std::ofstream fso(temp.c_str());
@@ -46,5 +47,4 @@ int main()
         assert(x == 3.25);
     }
     std::remove(temp.c_str());
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.assign/move_assign.pass.cpp b/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.assign/move_assign.pass.cpp
index 2032e935b..cf6c8ae68 100644
--- a/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.assign/move_assign.pass.cpp
+++ b/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <istream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -17,7 +19,6 @@
 #include <istream>
 #include <cassert>
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 struct testbuf
@@ -37,11 +38,9 @@ struct test_iostream
         {base::operator=(std::move(s)); return *this;}
 };
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb1;
         testbuf<char> sb2;
@@ -88,5 +87,4 @@ int main()
         assert(is2.precision() == 6);
         assert(is2.getloc().name() == "C");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.cons/move.pass.cpp b/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.cons/move.pass.cpp
index c0592e927..e8fd00c7a 100644
--- a/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.cons/move.pass.cpp
+++ b/test/std/input.output/iostream.format/input.streams/iostreamclass/iostream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <istream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -17,7 +19,6 @@
 #include <istream>
 #include <cassert>
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 struct testbuf
@@ -37,11 +38,9 @@ struct test_iostream
         : base(std::move(s)) {}
 };
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb;
         test_iostream<char> is1(&sb);
@@ -74,5 +73,4 @@ int main()
         assert(is.precision() == 6);
         assert(is.getloc().name() == "C");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/iostream.format/input.streams/istream/istream.assign/move_assign.pass.cpp b/test/std/input.output/iostream.format/input.streams/istream/istream.assign/move_assign.pass.cpp
index 2876d76c1..18887b75d 100644
--- a/test/std/input.output/iostream.format/input.streams/istream/istream.assign/move_assign.pass.cpp
+++ b/test/std/input.output/iostream.format/input.streams/istream/istream.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <istream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -17,7 +19,6 @@
 #include <istream>
 #include <cassert>
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 struct testbuf
@@ -37,11 +38,9 @@ struct test_istream
         {base::operator=(std::move(s)); return *this;}
 };
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb1;
         testbuf<char> sb2;
@@ -88,5 +87,4 @@ int main()
         assert(is2.precision() == 6);
         assert(is2.getloc().name() == "C");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.assign/move_assign.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.assign/move_assign.pass.cpp
index 40fe0795d..1b58a9a52 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.assign/move_assign.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.assign/move_assign.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <ostream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -17,7 +19,6 @@
 #include <ostream>
 #include <cassert>
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 struct testbuf
@@ -37,11 +38,9 @@ struct test_ostream
         {base::operator=(std::move(s)); return *this;}
 };
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb1;
         testbuf<char> sb2;
@@ -88,5 +87,4 @@ int main()
         assert(os2.precision() == 6);
         assert(os2.getloc().name() == "C");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.cons/move.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.cons/move.pass.cpp
index b3045b323..7d225d495 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.cons/move.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <ostream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -17,7 +19,6 @@
 #include <ostream>
 #include <cassert>
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 struct testbuf
@@ -37,11 +38,9 @@ struct test_ostream
         : base(std::move(s)) {}
 };
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb;
         test_ostream<char> os1(&sb);
@@ -70,5 +69,4 @@ int main()
         assert(os.precision() == 6);
         assert(os.getloc().name() == "C");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
index 8be0b51d9..83210c087 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <ostream>
 
 // template <class charT, class traits = char_traits<charT> >
@@ -19,7 +21,6 @@
 #include <ostream>
 #include <cassert>
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class CharT>
 class testbuf
@@ -53,11 +54,9 @@ protected:
         }
 };
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         testbuf<char> sb;
         std::ostream(&sb) << "testing...";
@@ -68,5 +67,4 @@ int main()
         std::wostream(&sb) << L"123";
         assert(sb.str() == L"123");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/istringstream/istringstream.assign/move.pass.cpp b/test/std/input.output/string.streams/istringstream/istringstream.assign/move.pass.cpp
index e57ad55c9..2a428c5d9 100644
--- a/test/std/input.output/string.streams/istringstream/istringstream.assign/move.pass.cpp
+++ b/test/std/input.output/string.streams/istringstream/istringstream.assign/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::istringstream ss0(" 123 456");
         std::istringstream ss;
@@ -82,5 +83,4 @@ int main()
         s1 >> s;
         assert(s == L"Dddddddddddddddddd");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp b/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp
index adc46ab65..0a45b796b 100644
--- a/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp
+++ b/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::istringstream ss0(" 123 456");
         std::istringstream ss(std::move(ss0));
@@ -44,5 +45,4 @@ int main()
         ss >> i;
         assert(i == 456);
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/ostringstream/ostringstream.assign/move.pass.cpp b/test/std/input.output/string.streams/ostringstream/ostringstream.assign/move.pass.cpp
index a52068595..8801001f4 100644
--- a/test/std/input.output/string.streams/ostringstream/ostringstream.assign/move.pass.cpp
+++ b/test/std/input.output/string.streams/ostringstream/ostringstream.assign/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::ostringstream ss0(" 123 456");
         std::ostringstream ss;
@@ -42,5 +43,4 @@ int main()
         ss << i << ' ' << 567;
         assert(ss.str() == L"234 5676");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp
index 3d9e305e0..67bfc50cd 100644
--- a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp
+++ b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::ostringstream ss0(" 123 456");
         std::ostringstream ss(std::move(ss0));
@@ -40,5 +41,4 @@ int main()
         ss << i << ' ' << 567;
         assert(ss.str() == L"234 5676");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/stringstream.cons/move.pass.cpp b/test/std/input.output/string.streams/stringstream.cons/move.pass.cpp
index 4ae3aa6e8..436c76c5b 100644
--- a/test/std/input.output/string.streams/stringstream.cons/move.pass.cpp
+++ b/test/std/input.output/string.streams/stringstream.cons/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::stringstream ss0(" 123 456 ");
         std::stringstream ss(std::move(ss0));
@@ -48,5 +49,4 @@ int main()
         ss << i << ' ' << 123;
         assert(ss.str() == L"456 1236 ");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/stringstream.cons/move2.pass.cpp b/test/std/input.output/string.streams/stringstream.cons/move2.pass.cpp
index 78d682fc4..94de61610 100644
--- a/test/std/input.output/string.streams/stringstream.cons/move2.pass.cpp
+++ b/test/std/input.output/string.streams/stringstream.cons/move2.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -22,7 +24,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     std::vector<std::istringstream> vecis;
     vecis.push_back(std::istringstream());
     vecis.back().str("hub started at [00 6b 8b 45 69]");
@@ -34,5 +35,4 @@ int main()
         vecis[n].seekg(0, std::ios_base::beg);
         assert(vecis[n].str().size() == 31);
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/move.pass.cpp b/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/move.pass.cpp
index ccaf72d7e..3cce695c4 100644
--- a/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/move.pass.cpp
+++ b/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/move.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <sstream>
 
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
@@ -19,7 +21,6 @@
 
 int main()
 {
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
         std::stringstream ss0(" 123 456 ");
         std::stringstream ss;
@@ -50,5 +51,4 @@ int main()
         ss << i << ' ' << 123;
         assert(ss.str() == L"456 1236 ");
     }
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }