R help - Sep 2009 - Modify functions in base packages (needed for completion for proto objects)

Hello everyone,

I am trying to implement completion for proto objects. Proto extends  
environment in a hierarchical way. Thus completion should list all the  
names in all it's parent environments.

For "normal" classes defining names.class would do the job, but
completion
for "environment" is  hard coded in utils:::specialCompletions by
means of
base::ls(). As result defining names.proto does not work.

I tried to make "ls" generic and to do something like:

environment(ls.default) <- asNamespace('utils')
environment(ls) <- asNamespace('utils')
environment(ls.proto) <- asNamespace('utils')

That does not work either.

Is there a way to make utils:::specialCompletions use my "ls" instead
of
"base::ls"??

I know Deepayan Sarkar is working now on improving the completion system  
(potentially by introducing "completion" generic). That would
definitely
solve the problem. But for now, does a quick fix exist?

Thanks a lot,
Vitalie

See ?assignInNamespace

On Fri, Sep 11, 2009 at 10:02 AM, Vitalie S. <vitosmail at rambler.ru>
wrote:
>
> Hello everyone,
>
> I am trying to implement completion for proto objects. Proto extends
> environment in a hierarchical way. Thus completion should list all the
names
> in all it's parent environments.
>
> For "normal" classes defining names.class would do the job, but
completion
> for "environment" is ?hard coded in utils:::specialCompletions by
means of
> base::ls(). As result defining names.proto does not work.
>
> I tried to make "ls" generic and to do something like:
>
> environment(ls.default) <- asNamespace('utils')
> environment(ls) <- asNamespace('utils')
> environment(ls.proto) <- asNamespace('utils')
>
> That does not work either.
>
> Is there a way to make utils:::specialCompletions use my "ls"
instead of
> "base::ls"??
>
> I know Deepayan Sarkar is working now on improving the completion system
> (potentially by introducing "completion" generic). That would
definitely
> solve the problem. But for now, does a quick fix exist?
>
> Thanks a lot,
> Vitalie
>
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