[Rd] R_MakeExternalPtr 'tag' argument

William Dunlap wdunlap at tibco.com
Fri Nov 13 21:58:11 CET 2015

Most packages that use the R_MakeExternalPtr function use
Rf_install("pkgSpecificString") for its 'tag' argument (if they don't use
R_NilValue).  A few use Rf_mkChar("pkgSpecificString").

Is there any reason to prefer one over the other?

Bill Dunlap
TIBCO Software
wdunlap tibco.com

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