[R] Adding comment in C++ code for debugging purpose

Rui Barradas ru|pb@rr@d@@ @end|ng |rom @@po@pt
Sat Dec 17 07:09:31 CET 2022

Às 23:32 de 16/12/2022, Christofer Bogaso escreveu:
> Hi,
> I am using an R package where there are some C++ code.
> To check some intermediate values generated by that C++ code, I added
> a line like
> std::cout << "My values";
> Now with this modification, I next build a modified package (source) using
> R CMD build
> Next I install this modified package using install.packages() function
> However during the run-time of the C++ code with above modification, I
> dont get any print with "My values"
> Can you please help to understand why am not getting that printed?
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> and provide commented, minimal, self-contained, reproducible code.


If the package uses Rcpp try instead

Rcpp::Rcout << "My values" << "\n";   // or std::endl

More generally, there is also

R_Print("My values\n");

Hope this helps,

Rui Barradas

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