https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101998
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> ---
The C++ standard forbids it, that's why GCC gives an error.
"The operand of the unary & operator shall be an lvalue of some type T."
