https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92770
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Not a bug. (In reply to Raphael Kubo da Costa from comment #0) > The excerpt above works fine with libc++ and MSVC's STL. Implementations might accept it as an extension or by lucky accident, but the standard says it's undefined: http://eel.is/c++draft/requirements#res.on.functions-2.5 For our implementation accepting it is not possible.