functions.md

Functions (CLOSXP, BUILTINSXP, SPECIALSXP, FUNSXP)

Rboolean Rf_isFunction(SEXP);
Rboolean Rf_isPrimitive(SEXP);

FUNSXP is an abstract union type.

Internals

SEXP (FORMALS)(SEXP x);
SEXP (BODY)(SEXP x);
SEXP (CLOENV)(SEXP x);
int  (RDEBUG)(SEXP x);
int  (RSTEP)(SEXP x);
int  (RTRACE)(SEXP x);
void (SET_RDEBUG)(SEXP x, int v);
void (SET_RSTEP)(SEXP x, int v);
void (SET_RTRACE)(SEXP x, int v);
void SET_FORMALS(SEXP x, SEXP v);
void SET_BODY(SEXP x, SEXP v);
void SET_CLOENV(SEXP x, SEXP v);

Promises (PROMSXP)

LibExtern SEXP	R_UnboundValue;	    /* Unbound marker */
LibExtern SEXP	R_MissingArg;	    /* Missing argument marker */

SEXP (PRCODE)(SEXP x);
SEXP (PRENV)(SEXP x);
SEXP (PRVALUE)(SEXP x);
int  (PRSEEN)(SEXP x);
void (SET_PRSEEN)(SEXP x, int v);
void SET_PRENV(SEXP x, SEXP v);
void SET_PRVALUE(SEXP x, SEXP v);
void SET_PRCODE(SEXP x, SEXP v);
void SET_PRSEEN(SEXP x, int v);

Srcrefs

LibExtern SEXP	R_Srcref;           /* Current srcref, for debuggers */
SEXP R_GetCurrentSrcref(int);
SEXP R_GetSrcFilename(SEXP);