Displaying 6 results from an estimated 6 matches for "lglsxps".
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lglsxp
2017 Oct 20
1
Illegal Logical Values
I'm wondering if WRE Section 5.2 should be a little more explicit about misuse of integer values other than NA, 0, and 1 in LGLSXPs.? I'm thinking of this passage:
> Logical values are sent as 0 (FALSE), 1 (TRUE) or INT_MIN = -2147483648 (NA, but only if NAOK is true), and the compiled code should return one of these three values. (Non-zero values other than INT_MIN are mapped to TRUE.)
The parenthetical seems to sugg...
2019 Aug 28
3
What is the best way to loop over an ALTREP vector?
Hi devel team,
I'm working on C/C++ level ALTREP compatibility for a package. The package
previously used pointers to access the data of a SEXP, so it would not work
for some ALTREP objects which do not have a pointer. I plan to rewrite the
code and use functions like get_elt, get_region, and get_subset to access
the values of a vector, so I have a few questions for ALTREP:
1. Since an
2019 Sep 23
2
What is the best way to loop over an ALTREP vector?
...RInternal.h and altrep.c but did not find a solution for it. If not,
>>>> will
>>>> it be added in the future?
>>>>
>>>
>>> Element and region are guaranteed to always be defined and work (for
>>> altrep and non-altrep INTSXP, REALSXP, LGLSXPs, etc, we currently don't
>>> have region for STRSXP or VECSXP, I believe). If the altrep class does not
>>> provide them then default methods will be used, which may be inefficient in
>>> some cases but will work. Subset is currently a forward looking stub, but
>&g...
2019 Sep 23
0
What is the best way to loop over an ALTREP vector?
...class? I did a search on
>>> RInternal.h and altrep.c but did not find a solution for it. If not, will
>>> it be added in the future?
>>>
>>
>> Element and region are guaranteed to always be defined and work (for
>> altrep and non-altrep INTSXP, REALSXP, LGLSXPs, etc, we currently don't
>> have region for STRSXP or VECSXP, I believe). If the altrep class does not
>> provide them then default methods will be used, which may be inefficient in
>> some cases but will work. Subset is currently a forward looking stub, but
>> once impl...
2019 Sep 24
2
What is the best way to loop over an ALTREP vector?
...for it. If not,
> >>>>> will
> >>>>> it be added in the future?
> >>>>>
> >>>>
> >>>> Element and region are guaranteed to always be defined and work (for
> >>>> altrep and non-altrep INTSXP, REALSXP, LGLSXPs, etc, we currently
> don't
> >>>> have region for STRSXP or VECSXP, I believe). If the altrep class
> does not
> >>>> provide them then default methods will be used, which may be
> inefficient in
> >>>> some cases but will work. Subset is cu...
2019 Sep 24
0
What is the best way to loop over an ALTREP vector?
...but did not find a solution for it. If not,
>>>>> will
>>>>> it be added in the future?
>>>>>
>>>>
>>>> Element and region are guaranteed to always be defined and work (for
>>>> altrep and non-altrep INTSXP, REALSXP, LGLSXPs, etc, we currently don't
>>>> have region for STRSXP or VECSXP, I believe). If the altrep class does not
>>>> provide them then default methods will be used, which may be inefficient in
>>>> some cases but will work. Subset is currently a forward looking stub...