/// <summary>
/// Used to check the state that is holding an `enum` inside instead of `bool`
/// Note that the serialized thing is the string of that enum's name (the English name), not an integer or string-as-integer.
/// If 2 `enum` have the same value English name, one `enum`'s serialized name will be usable with the other.
/// </summary>
/// <typeparam name="ENUM">Type of the enum key.</typeparam>
/// <typeparam name="ENUM2">Type of the desired state.</typeparam>
public static ENUM2 State <ENUM, ENUM2>(ENUM e)
where ENUM : struct, Enum
where ENUM2 : struct, Enum
{
string enumString = PlayerPrefs.GetString(PersistentInternal.EnumToKey(e));
return(Enum.TryParse <ENUM2>(enumString, out var parsed) ? parsed : default);
/// <summary>
/// Get an `int` index of the `enum` key <param name="e">.
/// </summary>
public static void Index <ENUM>(ENUM e, int setTo)
where ENUM : struct, Enum
=> PlayerPrefs.SetInt(PersistentInternal.EnumToKey(e), setTo);
/// <summary>
/// Use an another set of `enum` instead of `bool` for a state to remember something that has more than 2 choices but still finite.
/// It is saved as a string representation of <param name="setTo">.
/// </summary>
/// <typeparam name="ENUM">Type of the enum key.</typeparam>
/// <typeparam name="ENUM2">Type of the state to remember.</typeparam>
public static void State <ENUM, ENUM2>(ENUM e, ENUM2 setTo)
where ENUM : struct, Enum
where ENUM2 : struct, Enum
=> PlayerPrefs.SetString(PersistentInternal.EnumToKey(e), setTo.ToString());