[Bug c++/65575] [c++-concepts] Parse error for requires clause on functions that return a reference type

[andrew.n.sutton at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65575

--- Comment #3 from Andrew Sutton <andrew.n.sutton at gmail dot com> ---
Created attachment 35163
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35163&action=edit
Patch applied in r221733