# std::bitset<N>::operator&=,|=,^=,~

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< cpp‎ | utility‎ | bitset

| (1) |
bitset& operator&=( const bitset& other ); |  | (until C++11)
bitset& operator&=( const bitset& other ) noexcept; |  | (since C++11) (until C++23)
constexpr bitset& operator&=( const bitset& other ) noexcept; |  | (since C++23)
| (2) |
bitset& operator|=( const bitset& other ); |  | (until C++11)
bitset& operator|=( const bitset& other ) noexcept; |  | (since C++11) (until C++23)
constexpr bitset& operator|=( const bitset& other ) noexcept; |  | (since C++23)
| (3) |
bitset& operator^=( const bitset& other ); |  | (until C++11)
bitset& operator^=( const bitset& other ) noexcept; |  | (since C++11) (until C++23)
constexpr bitset& operator^=( const bitset& other ) noexcept; |  | (since C++23)
| (4) |
bitset operator~() const; |  | (until C++11)
bitset operator~() const noexcept; |  | (since C++11) (until C++23)
constexpr bitset operator~() const noexcept; |  | (since C++23)

Performs binary AND, OR, XOR and NOT.

1) Sets the bits to the result of binary AND on corresponding pairs of bits of *this and `other`.
2) Sets the bits to the result of binary OR on corresponding pairs of bits of *this and `other`.
3) Sets the bits to the result of binary XOR on corresponding pairs of bits of *this and `other`.
4) Returns a temporary copy of *this with all bits flipped (binary NOT).

Note that `&=`, `|=`, and `^=` are only defined for bitsets of the same size `N`.

### Parameters

other | - | another bitset.

### Return value

1-3) *this.
4) std::bitset<N>(*this).flip().

### Example

Run this code

    #include <iostream>
    #include <string>
    #include <bitset>

    int main()
    {
        const std::string pattern_str{"1001"};
        std::bitset<16> pattern{pattern_str}, dest;

        for (std::size_t i = dest.size()/pattern_str.size(); i != 0; --i) {
            dest <<= pattern_str.size();
            dest |= pattern;
            std::cout << dest << " (i = " << i << ")\n";
        }

        std::cout << ~dest << " (~dest)\n";
    }

Output:

    0000000000001001 (i = 4)
    0000000010011001 (i = 3)
    0000100110011001 (i = 2)
    1001100110011001 (i = 1)
    0110011001100110 (~dest)

### See also

operator<<=operator>>=operator<<operator>> | performs binary shift left and shift right (public member function)

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