[ltk-user] why MAKE-INSTANCE not exported

[Peter Herth]

Hi Matus,

the common lisp package system is indeed a bit confusing at the
beginning. Took me years to really master the details of it.
In doubt, restart your lisp session to get a clean environment. The
fail-safe environment is having your code in your own package and set
up like this:

(in-package :cl-user)
(defpackage :my-package-name
  (:use :common-lisp :ltk)
  (:export
     #:my-function))

(in-package :my-package-name)

(defun my-function ()
   ...)

in this case you should be able to just use (make-instance 'frame ...)
as frame is imported from the LTk package. If you are not using the
LTk package you can alwas access its symbols with the package prefix,
here ltk:frame.
If you get any error, please paste the exact error message into the
mail, this sometimes helps with debugging :)

Peter

On Mon, Jun 27, 2011 at 8:30 AM, Matus Kmit <simply.nitaai at gmail.com> wrote:
> Thanks for the swift answer.
>
> Let me correct myself: make-instance seems to be correctly exported by
> CL package (SBCL), but when i try to, let's say create an instance of
> a frame object in my user-defined package the interpreter signals a
> name colision between the FRAME symbols of LTK and my package,
> although i never defined any symbol with that name. i am simply using:
>
> (make-instance 'frame :master nil ...)
>
> i think the error refers to this "frame* class designator.. Do i have
> to qualify it somehow and if yes how does one do that?
>
> That said, i have to admit, that i am still learning how to properly
> use lisp package system.
>
> Thanks for any advice,
> Matus
>
>
> On Sun, Jun 26, 2011 at 10:54 PM, Peter Herth <herth at peter-herth.de> wrote:
>> Hi Matus,
>>
>> it should be exported from the common-lisp package. Which lisp are you using?
>>
>> Peter
>>
>> On Sun, Jun 26, 2011 at 10:44 PM, Matus Kmit <simply.nitaai at gmail.com> wrote:
>>> Hi
>>>
>>> Sorry i am a newbie, but i have a question: What is the reason that
>>> MAKE-INSTANCE is not exported from the LTK package?
>>>
>>> Thank you
>>> matus
>>>
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>>> ltk-user site list
>>> ltk-user at common-lisp.net
>>> http://common-lisp.net/mailman/listinfo/ltk-user
>>>
>>
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>
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