Thanks you Jiefei and Michael! Travers
On Tue, Oct 22, 2019 at 8:14 AM Wang Jiefei <szwj...@gmail.com> wrote: > Hi Travers, > > Just an additional remarks to Michael's answer, if your S4 class inherits > from R's basic types, say integer, the resulting object will be an INTSXP. > If your S4 class does not inherit from any class, it will be an S4SXP. You > can think about this question from the object-oriented framework: If one > class inherits the integer class, what should R do to make all the integer > related functions compatible with the new class at C level? > > Best, > Jiefei > > On Tue, Oct 22, 2019 at 4:28 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 >> > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
