[Bug c++/90885] GCC should warn about 2^16 and 2^32 and 2^64

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90885

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
        read_bytes(&f, (char *) &(val),
                   ( (n < (2 ^ 8))  ? 1 :
                     ( (n < (2 ^ 16)) ? 2 :
                       ( (n < (2 ^ 24)) ? 3 :
                         4 ) ) ) );