Re: odd completion misbehavior?

["Benjamin R. Haskell" <zsh@xxxxxxxxxx>]

On Thu, 20 Oct 2011, Danek Duvall wrote:

> With the following completion function:
>
> 	_danek() {
> 		_arguments \
> 			"--zoo-name" \
> 			"--zipple-zoo-name"
> 	}
>
> and running under zsh -f with only
>
>    autoload -Uz compinit
>    compinit -i
>    compdef _danek danek
>
> if I type "danek --z<TAB>", I end up with "danek --z-name", with the 
> cursor on the dash between "z" and "name".  If I hit tab again, I end 
> up with "danek --zoo-name ", with the cursor after the final space. 
> If I setopt menucomplete, I get reasonable behavior.
>
> What have I done wrong with the completion function?

(Everywhere below, I'm marking the cursor position with '|')

Nothing.  Zsh is completing the entirety of the unambiguous portions. 
All of the possible completions in that context:

'--zoo-name' and '--zipple-zoo-name'

begin with: '--z'
and end with: '-name'

So, zsh completes as much as possible.

I'm also interested in a way to disable this behavior, but looking at 
all of the instances of 'suffix' and 'ambiguous' in anything remotely 
completion-related in zshall didn't turn up what style to set/unset (if 
such a style exists).

In my case, the place this bothers me is with _mysql and the 
--default-character-set, --defaults-file, and --defaults-extra-file 
settings:

mysql --def|<Tab>
mysql --default|-               # makes sense
mysql --defaults|<Tab>-         # add the 's'
mysql --defaults|<Tab>-file     # okay, now everything starts w/ '--defaults' and ends w/ '-file'
mysql --defaults-file=|         # but, tab again gets me --defaults-file, even though it was still ambiguous with --defaults-extra-file

Might be some way in which my styles are set up (accept-exact 
somewhere?).  But, I'm still getting my feet wet with zstyle.

--
Best,
Ben