People keep asking me how to use an `enum` or `FlagsAttribute` or bitwise, so here goes:

bitwise.cs

[Flags]
public enum attackType
{
  // Enums should have a 0 value
  None =     0,

  Melee =    1 << 0,
  Ranged =   1 << 1,
  Thrown =   1 << 2
}

public enum damageType
{
  // Enums should have a 0 value
  None =     0,

  Slash =    1 << 0,
  Pierce =   1 << 1,
  Bludgeon = 1 << 2,

  Cold =     1 << 4,
  Erode =    1 << 5,
  Heat =     1 << 6,
  Charge =   1 << 7,
  Force =    1 << 8,
}

public class Weapon {
  public AttackType Attack;
  public DamageType Damage;
}

public void main()
{
  // Example usages
  var Blade = new Weapon {
    Attack = attackType.Melee,
    Damage = damageType.Slash
  };
  
  var Knife = new Weapon {
    Attack = attackType.Melee,
    
    // It does both (BITWISE OR)
    Damage = damageType.Slash | damageType.Pierce,
  };
  
  // normally you'd instantiate something, but here's just an example
  var weapon = Knife;
  
  // Can this wepaon slash? (BITWISE AND)
  if ((weapon.Damage & DamageType.Slash) != 0) {}
  // True for both
  
  // Can this weapon bludgeon? (BITWISE AND)
  if ((weapon.Damage && DamageType.Bludgeon) != 0) {}
  // False for both
  
  // ADD Bludgeon to the weapon (BITWISE NOT)
  weaopn.Damage &= DamageType.Bludgeon
  
  // REMOVE Cold to the weapon (BITWISE NOT)
  weaopn.Damage &= - DamageType.Cold

  // TOGGLE Heat to the weapon (BITWISE XOR)
  weapon.Damage ^= DamageType.Heat
}