The type of builtin non-special forms
BUILTINSXP.Rd
BUILTINSXP is an object-like macro defining the SEXPTYPE
type of builtin non-special forms.
Declaration
#define BUILTINSXP 8 /* builtin non-special forms */
In Rinternals.h.
References
https://cran.r-project.org/doc/manuals/r-patched/R-ints.html#SEXPTYPEs