Changed __config to react to all of clang's currently documented has_feature flags, and renamed _LIBCPP_MOVE to _LIBCPP_HAS_NO_RVALUE_REFERENCES to be more consistent with the rest of the libc++'s flags, and with clang's nomenclature.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113086 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/istream b/include/istream
index e79d6eb..d71ec55 100644
--- a/include/istream
+++ b/include/istream
@@ -176,12 +176,12 @@
     explicit basic_istream(basic_streambuf<char_type, traits_type>* __sb);
     virtual ~basic_istream();
 protected:
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     basic_istream(basic_istream&& __rhs);
 #endif
 
     // 27.7.1.1.2 Assign/swap:
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     basic_istream& operator=(basic_istream&& __rhs);
 #endif
     void swap(basic_istream& __rhs);
@@ -287,7 +287,7 @@
     this->init(__sb);
 }
 
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -307,7 +307,7 @@
     return *this;
 }
 
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits>
 basic_istream<_CharT, _Traits>::~basic_istream()
@@ -1463,7 +1463,7 @@
     return __is;
 }
 
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits, class _Tp>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1474,7 +1474,7 @@
     return __is;
 }
 
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits>
 class basic_iostream
@@ -1493,12 +1493,12 @@
     explicit basic_iostream(basic_streambuf<char_type, traits_type>* __sb);
     virtual ~basic_iostream();
 protected:
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     basic_iostream(basic_iostream&& __rhs);
 #endif
 
     // assign/swap
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     basic_iostream& operator=(basic_iostream&& __rhs);
 #endif
     void swap(basic_iostream& __rhs);
@@ -1512,7 +1512,7 @@
 {
 }
 
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits>
 inline _LIBCPP_INLINE_VISIBILITY
@@ -1530,7 +1530,7 @@
     return *this;
 }
 
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits>
 basic_iostream<_CharT, _Traits>::~basic_iostream()
@@ -1655,7 +1655,7 @@
     return getline(__is, __str, __is.widen('\n'));
 }
 
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template<class _CharT, class _Traits, class _Allocator>
 inline
@@ -1675,7 +1675,7 @@
     return getline(__is, __str, __is.widen('\n'));
 }
 
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _CharT, class _Traits, size_t _Size>
 basic_istream<_CharT, _Traits>&