Dear list, I am writing C code to interface with R, and I would like to know the level of mutability for the type of a SEXP.
I see that there is a macro/function TYPEOF(), and that it can be used as an l-value, as well as a macro/function SET_TYPEOF(). My question is "should the type be considered immutable, or it can it change after the SEXP has been created and used for a while ?". I understand that a call to TYPEOF will not perform any conversion, and my question is only about being sure that once the type of a given SEXP is set it cannot change. Laurent ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
