Language Features of C++17:copyright: 2019 Bartlomiej Filipek, https://www.bfilipek.com Last update July 2019New auto rules for direct-list-initialization auto x { 1 }; will be now deduced as int, but before it was aninitializer list. For a braced-init-list with only a single element, autodeduction will deduce from that entry; For a braced-init-list with morethan one element, auto deduction will be ill-formed.Typename in a template template parameter You can now use typename instead of class w