Using bitset for fixed-size sequences of bits
It is not uncommon for developers to operate with bit flags. This can be either because they work with operating system APIs (usually written in C) that take various types of arguments (such as options or styles) in the form of bit flags, or because they work with libraries that do similar things, or simply because some types of problems are naturally solved with bit flags. We can think of alternatives to working with bits and bit operations, such as defining arrays that have one element for every option/flag, or defining a structure with members and functions to model the bit flags, but these are often more complicated; and in the case where you need to pass a numerical value representing bit flags to a function, you still need to convert the array or the structure to a sequence of bits. For this reason, the C++ standard provides a container called
std::bitset for fixed-size sequences of bits.
For this recipe, you...