Go to the documentation of this file. 55 #ifndef _GLIBCXX_ITERATOR 56 #define _GLIBCXX_ITERATOR 1 58 #pragma GCC system_header 70 #if __cplusplus >= 201402L && ! defined _GLIBCXX_DEBUG // PR libstdc++/70303 71 # define __cpp_lib_null_iterators 201304L