Re: [PATCH] _compdef: Use zsh/param instead of a glob.

[Matthew Martin <phy1729@gmail.com>]

On Sun, Aug 26, 2018 at 10:54:04AM +0000, Daniel Shahaf wrote:
> In particular, this allows functions defined inside another file to be
> offered, such as various __git_foo() helpers defined in ${^fpath}/_git.

I don't think this is a good idea at present. While the completion
system does use the _ prefix namespace, I don't see anything in the
documentation reserving the namespace to the completion system. There
are already a number of projects[0] that use the _* namespace. Perhaps
in 5.6 document that only completion functions should start with an
underscore and then apply this patch for 5.7 so that users have time to
adapt.

- Matthew Martin


0: From the first page of searching zsh on github there's oh-my-zsh,
pretzo, zsh-autosuggestions, and zsh-syntax-highlighting that use
_ prefixed functions.
> ---
>  Completion/Zsh/Command/_compdef | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/Completion/Zsh/Command/_compdef b/Completion/Zsh/Command/_compdef
> index 7a64da835..003c37da3 100644
> --- a/Completion/Zsh/Command/_compdef
> +++ b/Completion/Zsh/Command/_compdef
> @@ -1,6 +1,6 @@
>  #compdef compdef
>  
> -local state line expl list disp curcontext="$curcontext" pat normal ret=1
> +local state line expl disp curcontext="$curcontext" pat normal ret=1
>  local args1 args2
>  typeset -A opt_args
>  
> @@ -57,7 +57,8 @@ case $state in
>      _wanted commands expl 'completed command' compadd -k _comps && ret=0
>    ;;
>    cfun)
> -    list=( ${^fpath:/.}/_(|*[^~])(:t) )
> +    typeset -aU list=( ${(k)functions[(I)_*]} )
> +    (( ${+list[1]} )) || list+=( ${^fpath:/.}/_(|*[^~])(:t) )
>      if zstyle -T ":completion:${curcontext}:functions" prefix-hidden; then
>        disp=( ${list[@]#_} )
>        _wanted functions expl 'completion function' \