Yes, any object of a class that derives from a basic type, like an atomic vector for example, will be of the basic SEXP type, with the S4 bit set. This means that a class can extend "integer" and objects of that class can be treated as any ordinary integer vector. S4SXP is only for objects that do not derive from another basic type.
Michael On Tue, Oct 22, 2019 at 1:28 AM Travers Ching <trave...@gmail.com> wrote: > > I'm trying to understand the R internals a bit better and reading over the > documentation. > > I see that there is a bit related to whether an object is S4 > (S4_OBJECT_MASK), and also the object type S4SXP (25). The documentation > makes clear that these two things aren't the same. > > But in practice, will the S4-bit and object type ever disagree for S4 > objects? I know that one can set the bit manually in C; are there any > practical applications for doing so? > > Thank you > Travers > > [[alternative HTML version deleted]] > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Michael Lawrence Scientist, Bioinformatics and Computational Biology Genentech, A Member of the Roche Group Office +1 (650) 225-7760 micha...@gene.com Join Genentech on LinkedIn | Twitter | Facebook | Instagram | YouTube ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
