Re: prog-mode not available in earlier Emacsen, need help with cfengine.el

[Reiner Steib <reinersteib+gmane@imap.cc>]

On Fri, Nov 25 2011, Ted Zlatanov wrote:

| On Tue, Nov 22 2011, Stefan Monnier wrote:
| > I think that
| >   (unless (fboundp 'prog-mode) (defalias 'prog-mode 'fundamental-mode))
| > should do the trick.

> I'll change the non-Emacs one so it explains this and has compatibility
> code.  

Please don't define/defalias prog-mode, because other code might test
for (fboundp 'prog-mode) an expect a real prog-mode.

,----[ (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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