[Rd] R_MakeExternalPtr

TB thomas.baier at kirchnersoft.com
Mon Oct 24 10:12:30 CEST 2005


I'm using R_MakeExternalPtr() to store handles to (COM) objects in a SEXP.

The code basically is

	sexp = R_MakeExternalPtr(handle,R_NilValue,R_NilValue);

After creating the sexp, LENGTH(sexp) returns some quite large integer
value. It seems like an "unitialized" value.

Can I safely assume, that an SEXP of type EXTPTRSXP can only contain a
single pointer value and never represent a vector (an array) of pointers? Or
should I maybe explicitly add something like


Best wishes from sunny Austria,

Thomas Baier

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