[Rd] A bug understanding F relative to FALSE?

[Jan Gorecki]

I agree it is not good to have those symbols used in packages, but I
found to use those quite often in my developement workflow, which is
something like:

    $ R -q
    > cc(F)

where `cc` is my function to rebuild application to recent state. I
use it really often. Having to type FALSE every time makes this
workflow relatively longer.
IMO it would be best to warn about T/F symbols during package check,
but not necessarily removing them globally.

On Fri, Jan 17, 2020 at 4:01 PM Joris Meys <jorismeys using gmail.com> wrote:
>
> As others have pointed out, this is expected behaviour. Let me get on that
> hill I'll die on: it is absolutely not suitable. It is way beyond time to
> remove T and F as unprotected kind-of-synonyms for TRUE and FALSE, given
> the amount of times I had to point out that:
>
> T <- t(matrix(0:3,nrow=2))
> isTRUE(T)
>
> was the reason the code didn't do what it's supposed to do. (Also don't use
> T as short for "Transpose of my matrix", but that's another hill.)
>
> As we've become more strict on the use of T and F in packages, maybe 4.0.0
> is a good milestone to finally drop this relic from the past? One can
> dream...
>
> Kind regards
> Joris
>
> On Wed, Jan 15, 2020 at 3:14 PM IAGO GINÉ VÁZQUEZ <i.gine using pssjd.org> wrote:
>
> > Hi all,
> >
> > Is the next behaviour suitable?
> >
> > identical(F,FALSE)
> >
> > ## [1] TRUE
> >
> > utils::getParseData(parse(text = "c(F,FALSE)", keep.so=rce = TRUE))
> >
> > ##    line1 col1 line2 col2 id parent                token terminal  text
> > ## 14     1    1     1   10 14      0                 expr    FALSE
> > ## 1      1    1     1    1  1      3 SYMBOL_FUNCTION_CALL     TRUE     c
> > ## 3      1    1     1    1  3     14                 expr    FALSE
> > ## 2      1    2     1    2  2     14                  '('     TRUE     (
> > ## 4      1    3     1    3  4      6               SYMBOL     TRUE     F
> > ## 6      1    3     1    3  6     14                 expr    FALSE
> > ## 5      1    4     1    4  5     14                  ','     TRUE     ,
> > ## 9      1    5     1    9  9     10            NUM_CONST     TRUE FALSE
> > ## 10     1    5     1    9 10     14                 expr    FALSE
> > ## 11     1   10     1   10 11     14                  ')'     TRUE     )
> >
> > I would expect that token for F is the same as token for FALSE.
> >
> >
> > Thank you!
> >
> > Iago
> >
> >
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> >
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> >
>
>
> --
> Joris Meys
> Statistical consultant
>
> Department of Data Analysis and Mathematical Modelling
> Ghent University
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