Re: Is there a way of setting a variable only when it exists?

[Emanuel Berg]

Marcin Borkowski wrote:

>>>   want to do something else. In that case, the something
>>>   else tends to depend on the specifics so (if (boundp
>>>   'foo) (setq foo ..) ...) is about s good as it gets.
>>
>> If it exists set it with `setq'. If it doesn't exist,
>> create and set it ... with `setq'?
>
> What if it's an internal Emacs variable which might become
> a user option one day (I submitted a bug report about it)
> and then my customization silently disappears? It's the
> "silently" part I want to guard against...

Yeah, that whole system ... *mumble*

But here you go,

(let ((var (variable-at-point t))) ; ANY-SYMBOL
  (when (and (custom-variable-p var)
             (get var 'custom-set) )
    (message "user variable") ))

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