enum_flags.zig

const std = @import("std");

const Flag = packed enum (u4) {
  one = 1,
  two = 2,

  pub fn with(flags: []const Flag) u4 {
    var value: u4 = 0;
    for (flags) |flag| {
      value = value | @enumToInt(flag);
    }

    return value;
  }
};

pub fn main() anyerror!void {
    const flags = []Flag { Flag.one, Flag.two };
    const value = Flag.with(flags);

    std.debug.warn("flags: {}, value: {}\n", flags, value);
}