Core features needed for a lang-mode. Needed documentation?

Core features needed for a lang-mode. Needed documentation?

[Elias Mårtenson]

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In developing gnu-apl-mode, I have successively added more and more
features that people seems to expect to exist in any language mode. My
problem is that I'm a newbie at Emacs with only 20+ years of experience
using it, so of course I don't know all things a lang-mode can do.

After thinking that my mode was pretty complete, I discovered things like
imenu and speedbar which I had never used, but is actually pretty cool when
support was added for it.

Is there a comprehensive documentation anywhere which details all features
that such a mode can (should) implement?

Somehow, I feel that there are more features that I should support that I
simply don't know about.

Regards,
Elias

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Re: Core features needed for a lang-mode. Needed documentation?

[Eli Zaretskii]

> Date: Sun, 10 Aug 2014 13:45:17 +0800
> From: Elias Mårtenson <lokedhs@gmail.com>
> 
> In developing gnu-apl-mode, I have successively added more and more
> features that people seems to expect to exist in any language mode. My
> problem is that I'm a newbie at Emacs with only 20+ years of experience
> using it, so of course I don't know all things a lang-mode can do.
> 
> After thinking that my mode was pretty complete, I discovered things like
> imenu and speedbar which I had never used, but is actually pretty cool when
> support was added for it.
> 
> Is there a comprehensive documentation anywhere which details all features
> that such a mode can (should) implement?

There's some documentation in the node "Major Mode Conventions" in the
ELisp manual.