std::bitset<N>::reset
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General utilities
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bitset& reset();
(1)
(noexcept since C++11) (constexpr since C++23)
bitset& reset( std::size_t pos );
(2)
(constexpr since C++23)
Sets bits to false.
1) Sets all bits to false
2) Sets the bit at position pos to false.
[edit] Parameters
pos
-
the position of the bit to set
[edit] Return value
*this
[edit] Exceptions
[edit] Example
Run this code
#include <bitset> #include <iostream> int main() { std::bitset <8> b(42); std::cout << "Bitset is " << b << '\n'; b.reset(1); std::cout << "After b.reset(1): " << b << '\n'; b.reset(); std::cout << "After b.reset(): " << b << '\n'; }
Output:
Bitset is 00101010 After b.reset(1): 00101000 After b.reset(): 00000000
[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 |