Rename uses of _ and __ because these are getting stepped on by macros from other system code. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@167038 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/iterator b/include/iterator index 5747504..bcbf3ae 100644 --- a/include/iterator +++ b/include/iterator 
@@ -337,7 +337,7 @@  struct __has_iterator_category  {  private: - struct __two {char _; char __;}; + struct __two {char __lx; char __lxx;};  template <class _Up> static __two __test(...);  template <class _Up> static char __test(typename _Up::iterator_category* = 0);  public: