Best way to programmatically define a function

[lith]

Hi!

What's the best way to create a function that creates functions?

I currently construct a string with the vim code, put that into a register, and then evaluate the register. See https://github.com/tomtom/tcomment_vim/blob/master/plugin/tcomment.vim#L165 for an example.

This works well but seems to cause serious problems in certain situations with certain installations. See here for an example report: https://github.com/tomtom/tcomment_vim/issues/140

Is this a known issue with certain versions of gvim?

Is there an alternative way to achieve this that doesn't cause the problem reported above?

Regards,
Tom

[Nikolay Pavlov]

2015-04-26 20:42 GMT+03:00 lith <mini...@gmail.com>:
> Hi!
>
> What's the best way to create a function that creates functions?
>
> I currently construct a string with the vim code, put that into a register, and then evaluate the register. See https://github.com/tomtom/tcomment_vim/blob/master/plugin/tcomment.vim#L165 for an example.

It is very strange to do this via a register. Just use `execute join(fn, "\n")`.

Also note that `let @t=t` does *not* restore register correctly. E.g. try

call setreg('a', ['a', 'b', 'c'], 'b1')
echo getregtype('a') " Echoes ^V1
let @a=@a
echo getregtype('a') " Echoes v: register type is determined
automatically at `let @a` and is never block

. Also

let reg = ["a\n", "b"]
call setreg('a', reg)
let @a=@a
echo reg ==# getreg('a', 1, 1) " Echoes 0: NUL cannot be restored
via `let @a`

.

>
> This works well but seems to cause serious problems in certain situations with certain installations. See here for an example report: https://github.com/tomtom/tcomment_vim/issues/140
>
> Is this a known issue with certain versions of gvim?
>
> Is there an alternative way to achieve this that doesn't cause the problem reported above?
>
> Regards,
> Tom
>

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[lith]

> It is very strange to do this via a register. Just use `execute join(fn, "\n")`.

Hm ... I'm pretty sure the last time I tried the more obvious solution it didn't work for defining functions. Thanks.

Thanks for pointing out the problem with the register.