TheSwamp

Code Red => AutoLISP (Vanilla / Visual) => Topic started by: Grrr1337 on March 20, 2017, 08:10:37 AM

Title: Reactors - (lambda) as a callback function?
Post by: Grrr1337 on March 20, 2017, 08:10:37 AM

Hi guys, reactor dummy asking:
Is it possible to set lambda function as a callback function to a reactor?

I've did some simple test and it failed:

Code - Auto/Visual Lisp: [Select]

1. _$ (vlr-Mouse-reactor "test" ; include the new reactor
2.   (list
3.     (cons :vlr-beginDoubleClick
4.       (lambda (rtr arg)
5.         (alert (strcat "\nrtr " (vl-prin1-to-string rtr) "\narg " (vl-prin1-to-string arg)))
6.       )
7.     ); cons
8.   ); list
9. ); vlr-mouse-reactor
10.  
11. Error: bad argument type: (or stringp symbolp): #<USUBR @0000005c713bba70 -lambda->
12. _1$

Although:

Code - Auto/Visual Lisp: [Select]

1. _$ (equal
2.   (type Dclick:callback)
3.   (type
4.     (lambda (rtr arg)
5.       (alert (strcat "\nrtr " (vl-prin1-to-string rtr) "\narg " (vl-prin1-to-string arg)))
6.     )
7.   )
8. )
9. T
10. _$

But before I fully gave up on this idea, I wanted someone else that perhaps tried this long time ago to comfirm that this is impossible?
 :thinking:

Title: Re: Reactors - (lambda) as a callback function?
Post by: roy_043 on March 20, 2017, 10:21:35 AM

The documentation is pretty clear:

Quote from: http://docs.autodesk.com/ACD/2011/ENU/filesALR/WS1a9193826455f5ff1a32d8d10ebc6b7ccc-679d.htm

callback_function is a symbol representing a function

Title: Re: Reactors - (lambda) as a callback function?
Post by: Grrr1337 on March 20, 2017, 10:41:22 AM

Thanks Roy!
I thought that I could fool this with lambda, instead of defining a simple named function.  :uglystupid2: