How to constrain Generics to specific types?

[Shmulik]

Is there a way to constrain a Generics class to only accept specific value
types,
for instance, lets say I want to create a Histogram class that could accept
the types int, float, double, etc., but not char or string.

Is is possible to declare the class to do this?

class Histogram<T values> : constrain to {int, float, double}
{
....
Histogram<T v)
{
}

}

 

[Guest]

The 'where' keyword constrains generic types, although multiple constraints
are an "and" condition, not an "or" condition, for example:

class C<T> where T : IComparable, IEnumerable {}

IN that example T must implement both interfaces, so you can't really do
what you want. You could just write the class for the largest numeric type
you need (like decimal) then when you pass a smaller type it will be
implicitly cast up.