C#

Quote:

imho, you do pay a price for either one: the first example extends string; I think extending basic types is generally a mistake. In the second example, you pay a price for the rather awkward structure of the calling format.

BillWoodruff wrote:

1. where T : struct, Enum ... fails without 'struct, and 'struct must precede 'Enum

BillWoodruff wrote:

2. 'default cannot be used directly ... WeekDays.Default throws an error

 public static T IntToEnum<T>(int value, T defaultValue)
 {
     T enumValue = (Enum.IsDefined(typeof(T), value)) ? (T)(object)value : defaultValue;
     return enumValue;
 }

 public static T StringToEnum<T>(string value, T defaultValue)
 {
     T enumValue = (Enum.IsDefined(typeof(T), value)) ? (T)Enum.Parse(typeof(T), value) : defaultValue;
     return enumValue;
}