Defined in header
template< class T >
constexpr bool ispow2(T x) noexcept;
x is an integral power of two.
This overload only participates in overload resolution if
T is an unsigned integer type (that is, unsigned char, unsigned short, unsigned int, unsigned long, unsigned long long, or an extended unsigned integer type).
 Return value
x is an integral power of two; otherwise false.
|This section is incomplete|
Reason: no example