[ps-print] Why imposing symbols for user functions?

[ps-print] Why imposing symbols for user functions?

[drkm]

  Hi

  Why does PS Print impose user functions (in `ps-left-header' for
example) to be symbols?  `ps-generate-string-list' and
`ps-generate-header-line' use `symbolp' and `fboundp' instead of
`functionp'.  Why don't use the following, to allowing lambdas in PS
Print customs:

*** ps-print.el-orig	Thu Dec 23 07:02:00 2004
--- ps-print.el	Mon Mar  7 15:06:00 2005
***************
*** 4823,4829 ****
  		       ((stringp (car content))
  			(car content))
  		       ;; function symbol
! 		       ((and (symbolp (car content)) (fboundp (car content)))
  			(concat "(" (funcall (car content)) ")"))
  		       ;; variable symbol
  		       ((and (symbolp (car content)) (boundp (car content)))
--- 4823,4829 ----
  		       ((stringp (car content))
  			(car content))
  		       ;; function symbol
! 		       ((functionp (car content))
  			(concat "(" (funcall (car content)) ")"))
  		       ;; variable symbol
  		       ((and (symbolp (car content)) (boundp (car content)))
***************
*** 4863,4869 ****
  
     ;; Functions are called -- they should return strings; they will be inserted
     ;; as strings and the PS string delimiters added.
!    ((and (symbolp content) (fboundp content))
      (ps-output-string (ps-mule-encode-header-string (funcall content)
  						    fonttag)))
  
--- 4863,4869 ----
  
     ;; Functions are called -- they should return strings; they will be inserted
     ;; as strings and the PS string delimiters added.
!    ((functionp content)
      (ps-output-string (ps-mule-encode-header-string (funcall content)
  						    fonttag)))
  

--drkm

Re: [ps-print] Why imposing symbols for user functions?

[drkm]

Richard Stallman <rms@gnu.org> wrote:

> If it works, I guess the change is ok.
> Have you tried it and does it work?

  Yes, I use it for many months ago, with lambda functions in
`ps-left-header' and `ps-right-header'.

--drkm



	

	
		
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Re: [ps-print] Why imposing symbols for user functions?

[Vinicius Jose Latorre]

Hi drkm,


 >   Why does PS Print impose user functions (in `ps-left-header' for
 > example) to be symbols?  `ps-generate-string-list' and
 > `ps-generate-header-line' use `symbolp' and `fboundp' instead of
 > `functionp'.  Why don't use the following, to allowing lambdas in PS
 > Print customs:

Sorry for this very late answer.

The original ps-print creator (Jim Thompson) implemented this way.  Jacques
Duthen (the maintainer before me) and I didn't notice this problem.

Well, I'll install your patch.


Thanks for your patch,


Vinicius