Re: Extending define-derived-mode

[Juri Linkov]

>    I don’t have a clear vision right now, perhaps we want
>    multiple inheritance for hooks, perhaps we can simply allow
>    define-derived-mode to specify additional hooks to run, and create
>    some language hooks that are shared by every mode serving that language.
>    I’d like to hear your thoughts.

A well-known alternative to multiple inheritance would be to use mixins.
Implementation-wise this means extracting common parts to separate functions,
then calling e.g. 'js-base-setup' from both 'js-mode' and 'js-ts-mode'.