[R-pkg-devel] visible binding for '<<-' assignment

[Dan Zigmond]

That was where I started, but for some reason that triggered a WARNING
about these non-ASCII characters, which seemed worse. :-)

     Dan

.
--------------------------
Dan Zigmond
djz using shmonk.com



On Thu, Sep 3, 2020 at 3:26 PM Ben Bolker <bbolker using gmail.com> wrote:

>    OK, trying again.
>
>    Would it work to save the unescaped versions in a .RData file as in
>
> https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Data-in-packages
> ?  Presumably the problems with non-ASCII variables arise when they show
> up in a text-format (e.g. .R) file, not when they are read from a
> binary-format file?
>
>    Then, if you use LazyData: yes in the DESCRIPTION file (this may be
> the default?), these should automatically be accessible to users when
> the package is loaded?
>
>
> On 9/3/20 4:31 PM, Dan Zigmond wrote:
> > Hi, all. I am developing a package that includes some global variables.
> > Because these are non-ASCII, I have escaped them. But then because these
> > are difficult to read, I want to provide an easy way for users to
> unescape
> > all of them up front. Thus I have code like to create and save the data
> in
> > global variables in one file:
> >
> > pali_vowels <-
> >    c("a", "\u0101", "i", "\u012b", "u", "\u016b", "e", "o")
> > pali_consonants <-
> >    c("k", "kh", "g", "gh", "\u1e45",
> >      "c", "ch", "j", "jh", "\u00f1",
> >      "\u1e6d", "\u1e6dh", "\u1e0d", "\u1e0dh", "\u1e47",
> >      "t", "th", "d", "dh", "n",
> >      "p", "ph", "b", "bh", "m",
> >      "y", "r", "l", "v", "s", "h", "\u1e37", "\u1e43")
> > pali_alphabet <-c(pali_vowels, pali_consonants)
> > use_data(pali_alphabet, overwrite = TRUE)
> >
> > and then I try to export a function like this in another file:
> >
> > pali_string_fix <- function() {
> >    pali_alphabet <<-
> >       stringi::stri_unescape_unicode(pali_alphabet)
> >    # Several more of these...
> >    }
> >
> > The idea is that users can run pali_string_fix() once when they load the
> > package and then they won't need to deal with all the Unicode escape
> > sequences after that.
> >
> > However, this is getting rejected by the CRAN checks with the message:
> >
> > * checking R code for possible problems ... [4s] NOTE
> > pali_string_fix: no visible binding for '<<-' assignment to
> >    'pali_alphabet'
> >
> > I'm guessing this is because the data and the function are defined in
> > different files, so even though those globals are defined by my package,
> > that isn't obvious when the check is run on this code.
> >
> > Does anyone have advice for how to fix this?
> >
> >       Dan
> >
> > .
> > -------------------------
> > Dan Zigmond
> > djz using shmonk.com
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
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> > https://stat.ethz.ch/mailman/listinfo/r-package-devel
> >
>
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