Re: A vision for multiple major modes: some design notes

[Dmitry Gutov]

On 04/23/2016 09:12 PM, Eli Zaretskii wrote:

> > We must consider both these things together.  A prime design goal is to
> > allow an arbitrary major mode to be used by a super mode with the minimum
> > of adaptation to the major mode, ideally none.
>
> I think you make this goal the main one, and that is a mistake.  The
> changes that will be needed for supporting multiple modes in the same
> buffer will be extensive, whether you want it or not, so trying too
> hard to make it easier on modes to adapt will skew the design.

+1. I also think we can afford to require some changes to the major mode 
code, as long as they're simple, and it's easy to spot whether they have 
been made. A hundred or so regexps to change is not that much if the 
design is otherwise sound.