Re: Feature request: permanent-local values in hooks buffer local values

[Lennart Borgman (gmail)]

Richard Stallman wrote:
>     > Isn't change-major-mode-hook sufficient to take care of this need?
>
>     Perhaps you meant after-change-major-mode-hook?
>
> Isn't this about cleaning up something after you exit a major mode?
> `change-major-mode-hook' is the feature for that.

In a way, yes. But remember the goal. It is to let a minor mode that is 
turned on in the buffer survive changing major mode.

There are two kind of things to survive:

1) buffer local variable values, which are survived by using (put 
'VARIABLE 'permanent-local t)

2) buffer local entries in hooks. Those are what I am asking about here.

We have now mentioned three ways of achieving 2:

a) my original proposition in this thread

b) my (mis)interpretetion of your previous answer, where I suggested 
using a global entry in after-change-major-mode-hook

c) your suggestion to use change-major-mode-hook.

Using change-major-mode-hook would require something like this AFAICS:

- The minor mode that want to survive puts a function in the buffer 
local value of change-major-mode-hook.

- This function when called puts another function in the global value of 
after-change-major-mode-hook. This function should then restore the 
buffer local entries for the minor mode in the hooks. After this the 
function removes itself from the global value of 
after-change-major-mode-hook.

Is this the solution you would like?