How Nested Functions Work, part 2

[Walter Bright]

language_fan wrote:
> I read the comments and I think some of them are justified. You cannot 
> really expect the way you built dmd to be the only alternative. Efficient 
> closures can be implemented differently if you have a VM that supports 
> precise generational gc, region inference, and the language is a bit more 
> value oriented (= functional).

I don't understand how the article implies that it describes the only 
way to do it. It only describes *a* way.