Re: Bug/non-determinism in output of maparg() and map commands

Nikolay Pavlov wrote:

[..]

> >> Enable, disable, query, execute plus two callbacks. *Four* functions
> >> and two callbacks in place of just two simple functions, mostly using
> >> the functionality that is already there. Five if you remember about
> >> :mkvimrc and that somebody may want to replace that on top of new API:
> >> query will need a mirror function for creating a mapping then.
> >
> > You are completely missing the point: those two functions don't provide
> > the functionality we are talking about here.
>
> Why do you think so? They provide everything what is needed to
> implement the functionality we are talking about here in VimL.

This whole discussion started about the difficutly of using the result
of maparg(). As far as I can see you only provide a function to get more
mappings, it doesn't help with disabling and restoring mappings.
Dealing with that is not easy at all (dealing with modes,
escaping/unescaping, etc). I would not want every plugin writer to
re-invent the wheel.

The basic discussion first need to be held is whether to refer to a
mapping just by its LHS (plus mode) or a unique handle can be used. The
latter is useful if we disable a mapping but not delete it, it can then
be shadowed by another mapping.

We probably also need some kind of re-enable or restore function, that
takes the result of maparg() and defines a mapping with it. That avoids
string manipulation and using :exe (this is tricky because of the way
mappings need some characters to be escaped).

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