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SKILL versus SKILL++

gsimard
Hello everyone,

I am trying to use functions reserved to SKILL++ in my code but apparently it's not enabled on my installation. As an example, when I try this in the CIW:

(do ((x 0 x+1)) (print x))
Message: *Error* do: not supported in SKILL - do(((x 0 (x + 1))) print(x))

Quite clearly it's not expecting SKILL++ there. I could do without a do loop, but I'd really like to have access to what SKILL++ is about, that is, closures. For example:

(let ((x 0))
(defun total (y)
(setq x (plus x y))))

(total 3)

Message: *Error* eval: unbound variable - x

While in SKILL++ I would expect the result to be 3, x being a local state to the function total.

Is there a way to enable SKILL++ evaluation ?


Thank you,
Guillaume

  • In the CIW, if you type first:

    toplevel('ils)

    Then you can enter SKILL++ code. You can enter resume() to return to the SKILL toplevel.

    Or if the source is in a file, give it a suffix ".ils". Please read the chapters on SKILL++ in the SKILL Language User Guide - it's covered there - and in particular talks about calling SKILL from SKILL++ and vice versa, and how variables are shared between the two environments.

    Regards,

    Andrew.

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