### Compilation failed:

error: 1: operator '~' is not allowed
int bit_not(int x) { return ~x; }
                            ^^
error: 3: operator '%' is not allowed
int remainder(int x)    { return x %  2; }
                                 ^^^^^^
error: 4: operator '%=' is not allowed
int remainder_eq(int x) { return x %= 2;}
                                 ^^^^^^
error: 6: operator '<<' is not allowed
int shl   (int x) { return x <<  1; }
                           ^^^^^^^
error: 7: operator '<<=' is not allowed
int shl_eq(int x) { return x <<= 1; }
                           ^^^^^^^
error: 8: operator '>>' is not allowed
int shr   (int x) { return x >>  1; }
                           ^^^^^^^
error: 9: operator '>>=' is not allowed
int shr_eq(int x) { return x >>= 1; }
                           ^^^^^^^
error: 11: operator '&' is not allowed
int bit_and   (int x) { return x &  1; }
                               ^^^^^^
error: 12: operator '&=' is not allowed
int bit_and_eq(int x) { return x &= 1; }
                               ^^^^^^
error: 13: operator '|' is not allowed
int bit_or    (int x) { return x |  1; }
                               ^^^^^^
error: 14: operator '|=' is not allowed
int bit_or_eq (int x) { return x |= 1; }
                               ^^^^^^
error: 15: operator '^' is not allowed
int bit_xor   (int x) { return x ^  1; }
                               ^^^^^^
error: 16: operator '^=' is not allowed
int bit_xor_eq(int x) { return x ^= 1; }
                               ^^^^^^
13 errors