C#

N a v a n e e t h wrote:

How can I set such kind of restriction ?

xibeifeijian wrote:

Type type = enumType.GetType();

Type typParent=type.BaseType;
bool blIsEnum=false;
while(typParent!=null)

if (enumType.GetType() != typeof(System.Enum))
     throw new InvalidOperationException("An enum is expected");

leppie wrote:

enumType is Enum

N a v a n e e t h wrote:

Looks simple, but I cannot make it working. AFAIK, BaseType checking is required. When you use is, it throws exception for enum types too.

object f = DayOfWeek.Friday;

if (f is Enum)
{
  Console.WriteLine(f);
}
else
{
  Console.WriteLine("Not enum");
}

System.Type basetype = typeof(T) ;
             
if ( !basetype.IsEnum )
{
    throw ( new System.ArgumentException ( "T must be an Enum" ) ) ;
}

PIEBALDconsult wrote:

Does no one read my articles?

PIEBALDconsult wrote:

I suspect that all that checking for null in your example is needless.

PIEBALDconsult wrote:

Does no one read my articles?

N a v a n e e t h wrote:

Thanks. I figured it out. Great article though

PIEBALDconsult wrote:

I asked about it on MSDN and Jon Skeet said he'd ask whether or not an enum constraint might be in the future,