Re: [PATCH] Run hook when variable is set

[Kelly Dean]

Richard Stallman wrote:
> Hooks on setting variables is a fundamentally bad idea
> because it means that Lisp code which appears to just bind variables
> can call functions where you did not expect it.

But what if it's documented? For example, it's documented that setting the 
variable cursor-type not only sets a variable, but also has the side effect of 
changing how the cursor is displayed.

Disabling dynamic-cursor-mode could simply be another documented side effect of 
setting cursor-type. And DCM itself should also document that it's disabled 
when cursor-type is set, which is why I already included that in the docstring 
in the patch I posted.

Besides that, hooks on setting variables would be useful for debugging.