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From: "tomaqa at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/107296] C++20 nested typename: non-template used as
 template, need typename
Date: Mon, 17 Oct 2022 13:36:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107296

--- Comment #3 from Tom=C3=A1=C5=A1 K. <tomaqa at gmail dot com> ---
Created attachment 53716
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53716&action=3Dedit
minimal example

Description:

When `-std=3Dc++20` option is used, it requires `typename` in definition of=
 a
constructor of a template class that is nested in a nested class.
But it is not related to a typename in this case ...
I believe this is a consequence of c++20 new rules about treating `typename=
`.

The example works just fine if it is run with `-std=3Dc++17`, with the very=
 same
compiler.=