Question

I have some generic method

T SomeMethod(Func<T> func){
   T result = func();
     if (result != null)
       { //.....}
}

It works good if T is class. But what should I do if T is struct? How can I check if result == default(T) in case if T is struct?

P.S. I don’t want to use the constraint where T: class or Nullable types.

Answer 1

If T is compiled to be a struct then the comparison with null will always evaluate to false. This is covered in section 7.9.6 of the C# language spec

If an operand of a type parameter type T is compared to null, and the runtime type of T is a value type, the result of the comparison is false.