The type of special forms
SPECIALSXP.Rd
SPECIALSXP is an object-like macro defining the SEXPTYPE
type of special form objects.
Declaration
#define SPECIALSXP 7 /* special forms */
In Rinternals.h.
References
https://cran.r-project.org/doc/manuals/r-patched/R-ints.html#SEXPTYPEs