[R-pkg-devel] double colon

[Berry Boessenkool]

Thanks for your reply, Uwe.
The guy yesterday very strongly suggested it for user readability, but I wanted to get more opinions before doing so much work. (No offense, Steven).

I'm not sure whether we talk about the same thing considering functions *within* the package.
Say I have 'MyPackage' with 'fun_a' and also 'fun_b', which inside calls 'fun_a'. (Both exported)
That wouldn't be in imports or suggests, right?

Now image by unfortunate history there is 'AnotherPackage' that also has (its own and different) 'fun_a'.
Is far as I remember, 'fun_b' will still call 'fun_a' from 'MyPackage'.
I can't find back where I read that, though.
For user readability and to be on the safe side, in the future I'll write 'MyPackage::fun_a'.
(Of course, if I'm aware, I'll avoid same-name functions altogether).

kind regards,
Berry


> Subject: Re: [R-pkg-devel] double colon
> To: berryboessenkool at hotmail.com; r-package-devel at r-project.org
> From: ligges at statistik.tu-dortmund.de
> Date: Fri, 29 Jan 2016 16:56:28 +0100
> 
> 
> 
> On 29.01.2016 15:21, Berry Boessenkool wrote:
> >
> > Hi,
> > in our Berlin R User Group meeting yesterday we talked about dependencies in package development.
> > One thing that came up is that it's a good practice to explicitly write   package::function   in the code.
> >
> > Is it worth to go through all of my package and enhance the code in all instances?
> 
> No, *if* you import anyway (see below).
> 
> 
> > Or do you think that NAMESPACE sufficiently prevents using a function with the same name from another package than intended and people reading source code should be aware of that anyways?
> 
> Yes.
> 
> 
> > If Answer1==YES:
> > Should I also refer to other functions within my own package through   myPackage::otherFunction?
> 
> Yes, *if* you only suggest the package and do not import from the 
> namespace unconditionally, you should do that.
> 
> 
> Best,
> Uwe Ligges
> 
> 
> > Should I do that for base packages like graphics, stats, utils, grDevices? (we have to declare them in the NAMESPACE imports, after all)
> > What's a fast and easy way to find all the instances of 'external' function usage?
> >
> > I guess there must be discussions and guidelines about this, so some pointers instead of answers would be fine as well.
> > Thanks ahead,
> > Berry
> >
> >
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