[Rd] directives to explicitely exclude objects from import into namespaces

[Duncan Murdoch]

On 13-09-06 4:54 PM, Dr. Peter Ruckdeschel wrote:
> Hi,
>
> recently R CMD check --as-cran has noticed some more issues with
> package namespace imports with the recommended remedy to
> use importFrom() and friends.
>
> In my case, there was only a conflict restricted to some few imports,
> while I would prefer to still import all the non-conflicting objects,
> methods, and classes of the respective package namespace.
>
> So would it be possible to have some new directives along the lines
>
> import(<pkg>) ## importing the whole namespace of <pkg> in a first step
> notimportFrom(<pkg>, <obj1>, <obj2>,....)
>             ##  exclude <obj1>, <obj2>, ... again from the previous namespace import
>             ## and, similarly,
> notimportMethodsFrom(<pkg>, <meth1>, <meth2>,....)
> notimportClassesFrom(<pkg>, <cls1>, <cls2>,....)
>
> in the NAMESPACE file?
>
> Otherwise the list of object, methods, classes to be explicitely imported
> (in my case) got very long (and hence hard to maintain) -- much longer
> than the list of items to be excluded from an import.

This doesn't make sense to me.  How could it be easier to maintain a 
list over which you don't have control instead of one over which you do 
have control?

Duncan Murdoch


>
> Or have I overseen some obvious, easier way to achieve this?
>
> Best regards, Peter
>