Thanks for all replies. I think the idea of a callback and link to
RcppXPtrUtils is pointing me in the right direction.
Michael Meyer
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Greetings,
Suppose I wanted to develop a package with C++ code that contains virtual
functions which the package user should define.It's assumed that evaluation is
expensive so we do not want to define these in R and then call these
R-functions from C++.
Is this a reasonable idea with a standard
