Set each bit of this bitset for each corresponding bit that is 1 in the specified rhs, and leaves all other bits unchanged. Return a reference to this modifiable bitset. Note that this is equivalent to a bitwise AND.
rhs
Declared in <bslstl_bitset.h>
<bslstl_bitset.h>
bitset<N>& operator|=(bitset const& rhs) noexcept;