std::bitset<N>::flip
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General utilities
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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.
[edit] Parameters
pos
-
the position of the bit to flip
[edit] Return value
*this
[edit] Exceptions
[edit] 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
[edit] 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 does not correspond to a valid bit position |
always throws an exception in this case |