carb::cpp::countr_one_constexpr

Defined in carb/cpp/Bit.h

template<class T, std::enable_if_t<detail::IsUnsignedIntegral<T>::value, bool> = false>
constexpr int carb::cpp::countr_one_constexpr(T val) noexcept

Returns the number of consecutive 1 bits in the value of val, starting from the least significant bit (“right”).

See also

https://en.cppreference.com/w/cpp/numeric/countr_one

Note

Unlike countr_one(), this function is constexpr as it does not make use of intrinsics. Therefore, at runtime it is recommended to use countr_one() instead of this function.

Template Parameters

T – An unsigned integral type

Parameters

val – An unsigned integral value

Returns

The number of consecutive 1 bits in the provided value, starting from the least significant bit.