script-fu: illegal function?
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| script-fu: illegal function? | Gary Aitken | 17 Sep 18:28 |
| script-fu: illegal function? | Kevin Cozens | 17 Sep 22:47 |
| script-fu: illegal function? | Richard Gitschlag | 18 Sep 03:44 |
| script-fu: illegal function? | Gary Aitken | 18 Sep 22:07 |
| script-fu: illegal function? | Kevin Cozens | 18 Sep 22:17 |
script-fu: illegal function?
When I try the following in the script-fu console:
((define (find-dot txt txtLen offset) (print "foo")) (find-dot "abcd.ef" 7 1))
"foo"
Error: illegal function
The find-dot macro obviously exists and is being executed. So what is the illegal function it is complaining about?
Thanks
script-fu: illegal function?
On 12-09-17 02:28 PM, Gary Aitken wrote:
((define (find-dot txt txtLen offset) (print "foo")) (find-dot "abcd.ef" 7 1))
First, you wrapped the whole thing in ( ). Drop the leading and trailing parentheses.
Second, that is a line of Scheme code and Scheme does not contain a "print" function. You probably meant to use "display". Also keep in mind that the "display" function only takes a string so you may first need to convert what you pass it to a string.
script-fu: illegal function?
That's right - parentheses are not "free" in Scheme scripting, every opening parenthesis must be immediately followed by a function call. When you just want parentheses to group a few statements together with, call the (begin ... ) function:
(begin (function a) (function b) (etc ) ... )
-- Stratadrake
strata_ranger@hotmail.com
--------------------
Numbers may not lie, but neither do they tell the whole truth.
Date: Mon, 17 Sep 2012 18:47:38 -0400 From: kevin@ve3syb.ca
To: gimp-user-list@gnome.org
Subject: Re: [Gimp-user] script-fu: illegal function?On 12-09-17 02:28 PM, Gary Aitken wrote:
((define (find-dot txt txtLen offset) (print "foo")) (find-dot "abcd.ef" 7 1))
First, you wrapped the whole thing in ( ). Drop the leading and trailing parentheses.
Second, that is a line of Scheme code and Scheme does not contain a "print" function. You probably meant to use "display". Also keep in mind that the "display" function only takes a string so you may first need to convert what you pass it to a string.
--
Cheers!Kevin.
http://www.ve3syb.ca/ |"Nerds make the shiny things that distract Owner of Elecraft K2 #2172 | the mouth-breathers, and that's why we're | powerful!" #include | --Chris Hardwick _______________________________________________ gimp-user-list mailing list
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script-fu: illegal function?
On 09/17/12 21:44, Richard Gitschlag wrote:
That's right - parentheses are not "free" in Scheme scripting, every opening parenthesis must be immediately followed by a function call. When you just want parentheses to group a few statements together with, call the (begin ... ) function:
(begin (function a) (function b) (etc ) ... )
Thanks, both of you for clarifications. Not sure where I saw the "print" but it seems to work:
(define (find-dot txt txtLen offset) (print "foo") "xyz" "pqr") (find-dot "abcd.ef" 7 1)
find-dot"foo"
"pqr"
(define (find-dot txt txtLen offset) (display "foo") "xyz" "pqr") (find-dot "abcd.ef" 7 1)
find-dotfoo"pqr"
The function itself seems to be accepted. It appears the difference between using "display" and using "print" is that "print" outputs enclosing double quotes plus trailing newline; "display" outputs the unadorned string and no trailing newline.
-- Stratadrake
strata_ranger@hotmail.com
--------------------
Numbers may not lie, but neither do they tell the whole truth.> Date: Mon, 17 Sep 2012 18:47:38 -0400 > From: kevin@ve3syb.ca
> To: gimp-user-list@gnome.org
> Subject: Re: [Gimp-user] script-fu: illegal function? >
> On 12-09-17 02:28 PM, Gary Aitken wrote: > > ((define (find-dot txt txtLen offset) (print "foo")) (find-dot "abcd.ef" 7 1)) >
> First, you wrapped the whole thing in ( ). Drop the leading and trailing > parentheses.
>
> Second, that is a line of Scheme code and Scheme does not contain a "print" > function. You probably meant to use "display". Also keep in mind that the > "display" function only takes a string so you may first need to convert what > you pass it to a string.
>
> --
> Cheers!
>
> Kevin.
>
> http://www.ve3syb.ca/ |"Nerds make the shiny things that distract > Owner of Elecraft K2 #2172 | the mouth-breathers, and that's why we're > | powerful!"
> #include | --Chris Hardwick
> _______________________________________________ > gimp-user-list mailing list
> gimp-user-list@gnome.org
> https://mail.gnome.org/mailman/listinfo/gimp-user-list_______________________________________________ gimp-user-list mailing list
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script-fu: illegal function?
On 12-09-18 06:07 PM, Gary Aitken wrote:
On 09/17/12 21:44, Richard Gitschlag wrote:
That's right - parentheses are not "free" in Scheme scripting, every opening parenthesis must be immediately followed by a function call. When you just want parentheses to group a few statements together with, call the (begin ... ) function:
(begin (function a) (function b) (etc ) ... )
Thanks, both of you for clarifications. Not sure where I saw the "print" but it seems to work:
I just remembered that "print" is one of the deprecated functions that were part of the old SIOD days of Script-Fu. While "print" will work, it is not standard Scheme and should not be used in new scripts.
