std::bitset<N>::flip
From cppreference.com
bitset& flip();
|
(1) | (noexcept since C++11) (constexpr since C++23) |
bitset& flip( std::size_t pos );
|
(2) | (constexpr since C++23) |
Flips bits, i.e. changes true values to false and false values to true. Equivalent to a logical NOT operation on part or all of the bitset.
1) Flips all bits (like operator~, but in-place).
2) Flips the bit at the position
pos.Parameters
| pos | - | the position of the bit to flip |
Return value
*this
Exceptions
2) Throws std::out_of_range if
pos does not correspond to a valid bit position.Example
Run this code
#include <bitset>
#include <iostream>
int main()
{
std::bitset<4> flops;
std::cout << flops << '\n'
<< flops.flip(0) << '\n'
<< flops.flip(2) << '\n'
<< flops.flip() << '\n';
}
Output:
0000
0001
0101
1010
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 2250 | C++98 | the behavior was undefined if pos doesnot correspond to a valid bit position |
always throws an exception in this case |
See also
sets bits to true or given value (public member function) | |
sets bits to false (public member function) | |
| performs binary AND, OR, XOR and NOT (public member function) | |
| flips all the bits (public member function of std::vector<bool,Allocator>)
|