std::bitset<N>::reference
From cppreference.com
class reference; |
||
The std::bitset class includes std::bitset::reference
The primary use of std::bitset::reference is to provide an lvalue that can be returned from operator[].
Any reads or writes to a bitset that happen via a std::bitset::reference potentially read or write to the entire underlying bitset.
Member functions
(constructor) |
constructs the reference. There is no default constructor. The copy constructor is implicitly declared(until C++11)
defaulted(since C++11). There may be internal constructor that is accessible only to std::bitset itself. (public member function) |
(destructor) |
destroys the reference (public member function) |
operator= |
assigns a bool to the referenced bit (public member function) |
operator bool |
returns the referenced bit (public member function) |
operator~ |
returns inverted referenced bit (public member function) |
flip |
flips the referenced bit (public member function) |
std::bitset<N>::reference::~reference
~reference(); |
(constexpr since C++23) | |
Destroys the reference.
std::bitset<N>::reference::operator=
| (1) | ||
|
reference& operator=( bool x );
|
(until C++11) | |
|
reference& operator=
(
bool x )
noexcept
;
|
(since C++11) (constexpr since C++23) |
|
| (2) | ||
|
reference& operator=
(
const reference& x )
;
|
(until C++11) | |
|
reference& operator=
(
const reference& x )
noexcept
;
|
(since C++11) (constexpr since C++23) |
|
Assigns a value to the referenced bit.
Parameters
| x | - | value to assign |
Return value
*this
std::bitset<N>::reference::operator bool
operator bool() const; |
(until C++11) | |
operator bool() const noexcept; |
(since C++11) (constexpr since C++23) |
|
Returns the value of the referenced bit.
Parameters
(none)
Return value
The referenced bit.
std::bitset<N>::reference::operator~
bool operator~() const; |
(until C++11) | |
bool operator~() const noexcept; |
(since C++11) (constexpr since C++23) |
|
Returns the inverse of the referenced bit.
Parameters
(none)
Return value
The inverse of the referenced bit.
std::bitset<N>::reference::flip
reference& flip(); |
(until C++11) | |
reference& flip() noexcept; |
(since C++11) (constexpr since C++23) |
|
Inverts the referenced bit.
Parameters
(none)
Return value
*this
Example
Run this code
#include <bitset> #include <iostream> int main() { std::bitset<4> bs{0b1110}; std::bitset<4>::reference ref = bs[2]; auto info = [&](int id) { std::cout << id << ") bs: " << bs << "; ref bit: " << ref << '\n'; }; info(1); ref = false; info(2); ref = true; info(3); ref.flip(); info(4); ref = bs[1]; // operator=( const reference& x ) info(5); std::cout << "6) ~ref bit: " << ~ref << '\n'; }
Output:
1) bs: 1110; ref bit: 1 2) bs: 1010; ref bit: 0 3) bs: 1110; ref bit: 1 4) bs: 1010; ref bit: 0 5) bs: 1110; ref bit: 1 6) ~ref bit: 0
See also
| accesses specific bit (public member function) |