Re: [bug?] Abbreviation with an @

On 11/06/11 16:51, Quincy Bowers wrote:
> I would like to create an abbreviation like the following:
>
> :iabbrev @author @author Author Name
>
> But when I attempt this I get the error 'E474: Invalid argument'.
>
> This works fine though:
>
> :iabbrev @ @author Author Name

I was going to say you were doing something wrong, but I messed
with this for a good 10 minutes and was befuddled by the behavior.

Strangely, I noticed that if I'm in a help window and I execute
your first command, it works fine for me:

:help
:iab @author @author Author Name
:set modifiable
(ignore warning about changing a read-only file)
(insert "@author" in the text, and it expands as expected)

However, when I did it in a regular (non-help) text window, it
errored for anything longer than ":iab @a @author Author Name",
so if I try ":iab @au @author Author Name", it fails with the
E474. If I try combinations of ":set buftype=help nomodifiable
readonly" in a regular buffer to make it "help-ish", it also
gives the E474 when I try the :iab

I finally tracked it down to the fact that help-windows change
the 'iskeyword' setting:

vi -u NONE
:set isk?
:help
:set isk?

and compare the values. When I changed the setting for 'isk' to
remove "@", I could successfully issue your initial mapping:

:set isk-=@
:iab @author @author Author Name

and it worked without error, both creating the mapping and
expanding in insert mode.

I'm not sure why, regardless of the 'isk' setting, abbreviating
"@a" worked, but not "@author".

Hope that helps work around what I think might be a bug,

-tim

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