Defined in header <cstddef> | ||
---|---|---|
enum class byte : unsigned char {} ; | (since C++17) |
std::byte
is a distinct type that implements the concept of byte as specified in the C++ language definition.
Like char
and unsigned char
, it can be used to access raw memory occupied by other objects (object representation), but unlike those types, it is not a character type and is not an arithmetic type. A byte is only a collection of bits, and the only operators defined for it are the bitwise ones.
template <class IntegerType> constexpr IntegerType to_integer(std::byte b) noexcept; | (since C++17) |
Equivalent to: return IntegerType(b);
This overload only participates in overload resolution if std::is_integral_v<IntegerType>
is true.
template <class IntegerType> constexpr std::byte& operator<<=(std::byte& b, IntegerType shift) noexcept; | (1) | (since C++17) |
template <class IntegerType> constexpr std::byte& operator>>=(std::byte& b, IntegerType shift) noexcept; | (2) | (since C++17) |
return b = b << shift;
This overload only participates in overload resolution if std::is_integral_v<IntegerType>
is true.return b = b >> shift;
This overload only participates in overload resolution if std::is_integral_v<IntegerType>
is true.
template <class IntegerType> constexpr std::byte operator <<(std::byte b, IntegerType shift) noexcept; | (1) | (since C++17) |
template <class IntegerType> constexpr std::byte operator >>(std::byte b, IntegerType shift) noexcept; | (2) | (since C++17) |
return std::byte(static_cast<unsigned int>(b) << shift);
This overload only participates in overload resolution if std::is_integral_v<IntegerType>
is true.return std::byte(static_cast<unsigned int>(b) >> shift);
This overload only participates in overload resolution if std::is_integral_v<IntegerType>
is true.
constexpr std::byte& operator|=(std::byte& l, std::byte r) noexcept; | (1) | (since C++17) |
constexpr std::byte& operator&=(std::byte& l, std::byte r) noexcept; | (2) | (since C++17) |
constexpr std::byte& operator^=(std::byte& l, std::byte r) noexcept; | (3) | (since C++17) |
return l = l | r;
.return l = l & r;
.return l = l ^ r;
. constexpr std::byte operator|(std::byte l, std::byte r) noexcept; | (1) | (since C++17) |
constexpr std::byte operator&(std::byte l, std::byte r) noexcept; | (2) | (since C++17) |
constexpr std::byte operator^(std::byte l, std::byte r) noexcept; | (3) | (since C++17) |
constexpr std::byte operator~(std::byte b) noexcept; | (4) | (since C++17) |
return std::byte(static_cast<unsigned int>(l) | static_cast<unsigned int>(r));
.return std::byte(static_cast<unsigned int>(l) & static_cast<unsigned int>(r));
.return std::byte(static_cast<unsigned int>(l) ^ static_cast<unsigned int>(r));
.return std::byte(~static_cast<unsigned int>(b));
A numeric value n
can be converted to a byte value using std::byte{n}
, due to C++17 relaxed enum class initialization rules.
A byte can be converted to a numeric value (such as to produce an integer hash of an object) using std::to_integer
.
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
http://en.cppreference.com/w/cpp/types/byte