Le 15/11/2023 à 10:37, Michael Meyer via R-package-devel a écrit :
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++.
Hm, virtual C++ functions are defined at compilation time. Their binding
is done at runtime but at compilation time they must be already defined.
So, how a package user (who already installed and therefor compiled your
package) could define them? Moreover in R?
Or may be you mean that a user import your C++ code and define his own
derived function based on your virtual functions in his C++ code?
Or, another option, you call "virtual function" what is usually called
"callback function" like e.g. a function searching for roots of any user
defined function and taking it as a parameter. This latter is a callback
function.
Could you precise what you mean by "virtual function" and "package user
should define"?
Best,
Serguei.
Is this a reasonable idea with a standard solution?Are there packages that do
this?
Thanks in advance for all answers,
Michael Meyer
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