Re: Mail mode and message mode hooks

[Stefan Monnier]

>>> One problem that I can see with this is that code intended for one mode
>>> may not work properly for the other mode, but I can't think of any
>>> concrete examples.  Any thoughts?
>> 
>> I have no idea what kind of code people may run from such hooks.
>> 
>> The main thing to remember: the old behavior is just one setq away.
>> 
>> And as a strong supporter of message-mode, I see nothing wrong with
>> people preferring mail-mode for themselves.  Heck, I've been living with
>> exactly such a setq in my .emacs for many years now because I preferred
>> message-mode over the default mail-mode.
>> 
>> So there is really no need to work that hard at making message-mode work
>> like mail-mode.

> I am also a supporter of message-mode.  But a user moving from Emacs
> 23.1 to Emacs 23.2---a minor version upgrade!---should not experience
> breakage.  And as the feedmail example shows, there is at least one
> not-unreasonable setup that currently does break.

I think this is a small price to pay compared to the overall benefit of
properly supporting arbitrary chars and coding-systems, and other
MIME features.
Maybe we should try and add some ad-hoc checks à la bad-package-check to
catch the few known problematic cases.


        Stefan