Hi, 2009/12/10 Xavier Bestel <xavier.bes...@free.fr>: > > On Wed, 2009-12-09 at 23:13 +0100, Jiří Zárevúcky wrote: >> In order to make a value type nullable, you need to convert it to a >> reference type. That's what you call boxing. So nullable and "boxed" >> types are essentially the same (in C# anyway I think). Though I believe >> Vala doesn't actually treat nullable types as reference types, because >> there is no way to track reference count (someone correct me if I'm >> mistaken). A nullable variable is implemented as a simple pointer here. I'm not sure about the jargon, but I think "a pointer with memory management even if without reference counting" is actually a reference type. (like most of the compact classes) > > So that means you can't have boxed non-nullable types ? Yes, or at least it's a very hidden feature that needs to be documented ;-p > And that means a "double" has a different behavior than a "double?" ? Because of automatic boxing/unboxing, you won't notice the difference often, but yes, it could be. > > Non-obvious. => needs to be documented as part of the documentation hackaton
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