Topic: Visual Lisp Console

[Guido Rooms]

Hello to all,

When I enter the following at the prompt without quoting : (1 . 2)
then nothing at all happens, at least nothing that I can see.
The prompt just reappears as if nothing at all was read.
Doing this should throw an exception,  I think...

Can anybody explain this to me?
I don't understand.
Thanks in advance.

[Lee Mac]

Is anything printed at the AutoCAD command-line?

In my experience, VLIDE console errors are sometimes printed at the console and sometimes at the AutoCAD command-line.

[Guido Rooms]

Lee,

That's it, the error message seems to go to the wrong place.
At the prompt it says "bad syntax of function call: (1 . 2)".

Thanks a lot.
Do you know of any other jokes like that?

[Grrr1337]

Code: [Select]

_$ (list (1 . 2))
; bad syntax of function call: (1 . 2)  ; <- this is printed in autocad's command prompt

_$ '((1 . 2))
((1 . 2))

_$ (list (cons 1 2))
((1 . 2))

_$ (1 . 2)
; bad syntax of function call: (1 . 2) ; <-  this is printed in autocad's command prompt

_$ (cons 1 2)
(1 . 2)Conclusion: you must use apostrophe/quote for the list, for the "handmade" dotted pairs, otherwise AutoCAD reads them as a function calls.
I'm not a pro-lisper so my conclusion might be wrong or not full.