Re: How to call a function from b:undo_ftplugin?

On 07/01/13 10:32, Boris Danilov wrote:
> P.S.
> Okay, in documentation I found the following way to get the SID number:
>
> function s:SID()
> return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze_SID$')

I don't understand the SID$ at the end

> endfun
>
> So that I can probably use something like
> let b:undo_ftplugin = "call <SNR>" . s:SID . "_Func()"
---------------------------------------^^^^^ s:SID() with parens
>
> Is there a simpler way without all these workarounds?

Getting the "current script number" is feasible but not easy. If this
works for you after testing, stay with it.

>
> - Boris
>
> On Mon, Jan 7, 2013 at 1:24 PM, Boris Danilov <brdanilov@gmail.com> wrote:
>> Hello!
>>
>> The question is how to call a function on a ftplugin undo? As far as I
>> understand, the universal method for undoing stuff is putting commands
>> to b:undo_ftplugin, but I can't put either "s:Fun" or "<SID>Fun"
>> there.
>>
>> "s:Fun" doesn't work because b:undo_ftplugin is executed in the other
>> script file and "<SID>Fun" doesn't work because <SID> isn't expanded
>> in strings but expanded in the other place where b:undo_ftplugin is
>> being executed with :execute. Is there a function that will expand
>> <SID> immediatelly and convert it to a string?
>>
>> Of course there is always a way to use :autocmd FileType to handle it
>> manually, but then it makes me wonder why there is a mechanism of
>> b:undo_ftplugin if I have to do it on my own.
>>
>> What I am missing there?
>>
>> - Boris
>

Best regards,
Tony.
--
The cow is nothing but a machine with makes grass fit for us people to
eat.
-- John McNulty

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