Are enums the canonical way to implement bit flags?

Question

Currently I\'m using enums to represent a state in a little game experiment. I declare them like so:

namespace State {
  enum Value {
    MoveUp = 1 << 0,          


        

Answer 1

To be honest I don't think there is a consistent pattern for them.

Just look at std::ios_base::openmode and std::regex_constants::syntax_option_type as two completely different ways of structuring it in the standard library -- one using a struct, the other using an entire namespace. Both are enums all right, but structured differently.
Check your standard library implementation to see the details of how the above two are implemented.