[Rcpp-devel] Traits for NA?

[Romain Francois]

Le 09/04/13 09:51, Kirill Müller a écrit :
> Hi
>
> What is the best way to determine the NA value for a specific type given
> the type identifier (as returned by TYPEOF()), preferably as a
> compile-time constant?
>
> I'm looking for something along the following lines:
>
> static_assert(NA_traits<REALSXP>::value == NA_REAL);
> static_assert(NA_traits<LGLSXP>::value == NA_LOGICAL);
>
> Thanks.
>
>
> Cheers
>
> Kirill

You have these to get the NA and test against it

Rcpp::traits::is_na<RTYPE>(.)
Rcpp::traits::get_na<RTYPE>()

Romain

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