R_NilValue

Variable

R_NilValue is a global (external) variable of type SEXP. R_NilValue points to the C level implementation of R's NULL object.

Declaration

LibExtern SEXP	R_NilValue; /* The nil object */

In Rinternals.h.

Definition

GET_FREE_NODE(R_NilValue);

In memory.c.

See also

NULL, NILSXP, TYPEOF