The type of promise objects

Macro object-like

PROMSXP is an object-like macro defining the SEXPTYPE type of promise objects.

Declaration

#define PROMSXP 5 /* promises: [un]evaluated closure arguments */

In Rinternals.h.

References

https://cran.r-project.org/doc/manuals/r-patched/R-ints.html#SEXPTYPEs

See also

SEXPTYPE, TYPEOF