How to convert types with a question mark to types without it?

Question

C++ / C#

How to convert type "long?" in "long"?

Answer 1

https://docs.microsoft.com/en-us/dotnet/csharp/pro...

Answer 2

long? is analog Nullable<T>. If you look at the documentation, it becomes clear that this is a structure with two public fields: HasValue and Value, so it works like this:

//вариант 1
long? foo = ...;
if (foo.HasValue) 
{
  bar(foo.Value);
}

//вариант 2 (для самых смелых)
bar(foo.Value);