how can i use switch statement on type-safe enum pattern
c#, design-patterns, switch-statement
Solution
You can try something like this:
class Program
{
static void Main(string[] args)
{
Gender gender = Gender.Unknown;
switch (gender)
{
case Gender.Enum.Male:
break;
case Gender.Enum.Female:
break;
case Gender.Enum.Unknown:
break;
}
}
}
public class Gender : NameValue
{
private Gender(int value, string name)
: base(value, name)
{
}
public static readonly Gender Unknown = new Gender(Enum.Unknown, "Unknown");
public static readonly Gender Male = new Gender(Enum.Male, "Male");
public static readonly Gender Female = new Gender(Enum.Female, "Female");
public class Enum
{
public const int Unknown = -1;
public const int Male = 1;
public const int Female = 2;
}
}
public abstract class NameValue
{
private readonly int _value;
private readonly string _name;
protected NameValue(int value, string name)
{
_value = value;
_name = name;
}
public int Value
{
get { return _value; }
}
public string Name
{
get { return _name; }
}
public override string ToString()
{
return Name;
}
public override int GetHashCode()
{
return Value.GetHashCode();
}
public override bool Equals(object obj)
{
NameValue other = obj as NameValue;
if (ReferenceEquals(other, null)) return false;
return this.Value == other.Value;
}
public static implicit operator int(NameValue nameValue)
{
return nameValue.Value;
}
}
Problem
I found a goodlooking example about implementation enums in a different way. That is called type-safe enum pattern i think. I started using it but i realized that i can not use it in a switch statement. My implementation looks like the following: ``` public sealed class MyState { private readonly string m_Name; private readonly int m_Value; public static readonly MyState PASSED= new MyState(1, "OK"); public static readonly MyState FAILED= new MyState(2, "ERROR"); private MyState(int value, string name) { m_Name = name; m_Value = value; } public override string ToString() { return m_Name; } public int GetIntValue() { return m_Value; } } ``` What can i add to my class in order to be able to use this pattern in switch statements in C#? Thanks.