https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120458
--- Comment #2 from Pilar Latiesa <pilarlatiesa at gmail dot com> --- (In reply to Jonathan Wakely from comment #1) > Clang compiles this, and I think MSVC does, but EDG doesn't (but EDG also > doesn't accept that identifier for a variable name, at least with the > default options). I believe the necessary options are --c++20 --unicode_source_kind UTF-8