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Re: self-types, existentials, index and a general comment
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Posted: Jan 22, 2008 11:47 AM
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> Are self-type annotations explained in the book? If so,
> where? What about existential types? I can't find any
> occurrence of "self type", "self-type", "forSome" or
> "existential". Maybe I'm searching for the wrong terms?
>
Not in there yet, but will be in the final version.
> I suppose the final edition of the book will have an index
> as well?
>
Yes.
> In general, this suggests to me that the book might not
> describe the complete Scala language. If these sections
> are forthcoming, please disregard the comment. But if this
> is true, it really concerns me. I know that some parts of
> the language are potentially intimidating, but users will
> certainly encounter them eventually. (In fact, self-types
> are one of Scala's most novel, powerful and appealing
> features, and as of 2.6.2., existentials will be
> everywhere.) If they reach to the book for a reference and
> find that these features are "too advanced," the response
> is sure to be terrible. And in the end, it's probably the
> most advanced features that most need a good
> introduction.
>
> Scala is not such a huge language. I hope that in 500
> pages, the whole language can be introduced!
>
Right. Our plan is that the book cover all aspects of the language.
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