[Bug c++/99911] C++20 adl issue

[ppalka at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99911

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |ppalka at gcc dot 
gnu.org
                 CC|                            |ppalka at gcc dot gnu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-11-10
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=102760
             Status|UNCONFIRMED                 |ASSIGNED

--- Comment #6 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Reduced rejects-valid testcase:

namespace N {
  struct A { };
  template<class T> void get(A);
};

template<class T>
auto tuple_flatten() {
  return [] <class U> (U) { get<U>(T{}); };
}

int main() {
  tuple_flatten<N::A>()(0);
}