Re: hook and interactive with parameter

[tomas]

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On Mon, Feb 12, 2018 at 04:43:04PM +0100, Lajos Bodnar wrote:
> Thanks for your advice.
> I would like to write a function which run up if I open a haskell file.
> This function will ask a question automaticaly about that i would like to
> run the intero-mode or not.

Note that the `interactive' form is just "declarative", i.e.
it doesn't "do" anything on itself. It just states what kind
of parameters a function is going to take when invoked "as a
command", that is, from a key binding or similar.

The "magic" of asking for parameters happens there.

When that function is invoked from a hook this "magic" will be
missing :-) Besides, most hook functions are parameterless.

One way around it is asking the user actively. See for example
the function "read-from-minibuffer" (and perhaps most of the
chapter on minibuffers from the Emacs manual).

That said, to me, calling user interaction from a hook "feels"
a bit strange. But perhaps it's just me.

Cheers
- -- tomás
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