[Rd] R history: Why 'L; in suffix character ‘L’ for integer constants?

[William Dunlap]

"Writing R Extensions" says "int":

R storage mode  C type  FORTRAN type
logical  int*  INTEGER
integer  int*  INTEGER
double  double*  DOUBLE PRECISION
complex  Rcomplex*  DOUBLE COMPLEX
character  char**  CHARACTER*255
raw  unsigned char*  none

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Fri, Jun 16, 2017 at 11:53 AM, peter dalgaard <pdalgd at gmail.com> wrote:
>
> Wikipedia claims that C ints are still only guaranteed to be at least 16
bits, and longs are at least 32 bits. So no, R's integers are long.
>
> -pd
>
> > On 16 Jun 2017, at 20:20 , William Dunlap via R-devel <
r-devel at r-project.org> wrote:
> >
> > But R "integers" are C "ints", as opposed to S "integers", which are C
> > "long ints".  (I suppose R never had to run on ancient hardware with 16
bit
> > ints.)
> >
> > Bill Dunlap
> > TIBCO Software
> > wdunlap tibco.com
> >
> > On Fri, Jun 16, 2017 at 10:47 AM, Yihui Xie <xie at yihui.name> wrote:
> >
> >> Yeah, that was what I heard from our instructor when I was a graduate
> >> student: L stands for Long (integer).
> >>
> >> Regards,
> >> Yihui
> >> --
> >> https://yihui.name
> >>
> >>
> >> On Fri, Jun 16, 2017 at 11:00 AM, Serguei Sokol <sokol at insa-toulouse.fr
>
> >> wrote:
> >>> Le 16/06/2017 à 17:54, Henrik Bengtsson a écrit :
> >>>>
> >>>> I'm just curious (no complaints), what was the reason for choosing
the
> >>>> letter 'L' as a suffix for integer constants?  Does it stand for
> >>>> something (literal?), is it because it visually stands out, ..., or
no
> >>>> specific reason at all?
> >>>
> >>> My guess is that it is inherited form C "long integer" type (contrary
to
> >>> "short integer" or simply "integer")
> >>> https://en.wikipedia.org/wiki/C_data_types
> >>
> >> ______________________________________________
> >> R-devel at r-project.org mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-devel
> >
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> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Office: A 4.23
> Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com
>
>
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