Re: line-beginning-position/line-end-position undefined

[Reiner Steib]

On Tue, Mar 25 2008, Kurt Hornik wrote:

> I see that ESS has
>
> ;; XEmacs <= 21.4.15 needs this
> (if (not (fboundp 'line-beginning-position))
>     (defalias 'line-beginning-position 'point-at-bol))
>
> so this should do the job.  

Bad idea.  This is a recipe for trouble.  No package should define
function out of its own namespace.  Please report it as a bug to the
ESS maintainer.

,----[ (info "(elisp)Coding Conventions") ]
|    * If a package needs to define an alias or a new function for
|      compatibility with some other version of Emacs, name it with the
|      package prefix, not with the raw name with which it occurs in the
|      other version.  Here is an example from Gnus, which provides many
|      examples of such compatibility issues.
| 
|           (defalias 'gnus-point-at-bol
|             (if (fboundp 'point-at-bol)
|                 'point-at-bol
|               'line-beginning-position))
`----

Bye, Reiner.
-- 
       ,,,
      (o o)
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