Function IsPowerOfTwo

Bcore/src/main/cpp/base/bit_utils.h:144–148

template<typename T>
constexpr bool IsPowerOfTwo(T x) {
  static_assert(std::is_integral<T>::value, "T must be integral");
  // TODO: assert unsigned. There is currently many uses with signed values.
  return (x & (x - 1)) == 0;
}

template<typename T>
constexpr int WhichPowerOf2(T x) {