Standard library header <bit>
This header is part of the numeric library.
Types |
|
|
(C++20)
|
indicates the endianness of scalar types (enum) |
Functions |
|
|
(C++20)
|
reinterpret the object representation of one type as that of another (function template) |
|
(C++23)
|
reverses the bytes in the given integer value (function template) |
|
(C++20)
|
checks if a number is an integral power of two (function template) |
|
(C++20)
|
finds the smallest integral power of two not less than the given value (function template) |
|
(C++20)
|
finds the largest integral power of two not greater than the given value (function template) |
|
(C++20)
|
finds the smallest number of bits needed to represent the given value (function template) |
|
(C++20)
|
computes the result of bitwise left-rotation (function template) |
|
(C++20)
|
computes the result of bitwise right-rotation (function template) |
|
(C++20)
|
counts the number of consecutive 0 bits, starting from the most significant bit (function template) |
|
(C++20)
|
counts the number of consecutive 1 bits, starting from the most significant bit (function template) |
|
(C++20)
|
counts the number of consecutive 0 bits, starting from the least significant bit (function template) |
|
(C++20)
|
counts the number of consecutive 1 bits, starting from the least significant bit (function template) |
|
(C++20)
|
counts the number of 1 bits in an unsigned integer (function template) |
Synopsis
namespace std {
// bit_cast
template<class To, class From>
constexpr To bit_cast(const From& from) noexcept;
// byteswap
template <class T>
constexpr T byteswap(T value) noexcept;
// integral powers of 2
template<class T>
constexpr bool has_single_bit(T x) noexcept;
template<class T>
constexpr T bit_ceil(T x);
template<class T>
constexpr T bit_floor(T x) noexcept;
template<class T>
constexpr T bit_width(T x) noexcept;
// rotating
template<class T>
[[nodiscard]] constexpr T rotl(T x, int s) noexcept;
template<class T>
[[nodiscard]] constexpr T rotr(T x, int s) noexcept;
// counting
template<class T>
constexpr int countl_zero(T x) noexcept;
template<class T>
constexpr int countl_one(T x) noexcept;
template<class T>
constexpr int countr_zero(T x) noexcept;
template<class T>
constexpr int countr_one(T x) noexcept;
template<class T>
constexpr int popcount(T x) noexcept;
// endian
enum class endian {
little = /* see description */,
big = /* see description */,
native = /* see description */
};
}
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/header/bit
