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

include/stack

@@ -107,11 +107,11 @@ protected:
 public:
     stack() : c() {}
     explicit stack(const container_type& __c) : c(__c) {}
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     explicit stack(container_type&& __c) : c(_STD::move(__c)) {}
     stack(stack&& __s) : c(_STD::move(__s.c)) {}
     stack& operator=(stack&& __s) {c = _STD::move(__s.c); return *this;}
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     template <class _Alloc>
         explicit stack(const _Alloc& __a,
                        typename enable_if<uses_allocator<container_type,
@@ -127,7 +127,7 @@ public:
               typename enable_if<uses_allocator<container_type,
                                                 _Alloc>::value>::type* = 0)
             : c(__s.c, __a) {}
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     template <class _Alloc>
         stack(container_type&& __c, const _Alloc& __a,
               typename enable_if<uses_allocator<container_type,
@@ -138,7 +138,7 @@ public:
               typename enable_if<uses_allocator<container_type,
                                                 _Alloc>::value>::type* = 0)
             : c(_STD::move(__s.c), __a) {}
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
     bool empty()     const      {return c.empty();}
     size_type size() const      {return c.size();}
@@ -146,11 +146,13 @@ public:
     const_reference top() const {return c.back();}
 
     void push(const value_type& __v) {c.push_back(__v);}
-#ifdef _LIBCPP_MOVE
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     void push(value_type&& __v) {c.push_back(_STD::move(__v));}
+#ifndef _LIBCPP_HAS_NO_VARIADICS
     template <class... _Args> void emplace(_Args&&... __args)
         {c.emplace_back(_STD::forward<_Args>(__args)...);}
-#endif  // _LIBCPP_MOVE
+#endif  // _LIBCPP_HAS_NO_VARIADICS
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     void pop() {c.pop_back();}
 
     void swap(stack& __s)