cpp11 is a header-only R package that helps R package developers handle R objects with C++ code. Its goals and syntax are similar to the excellent Rcpp package.
To add cpp11 to an existing package, put your C++ files in the
src/ directory and add the following to your DESCRIPTION file:
LinkingTo: cpp11 SystemRequirements: C++11
Then decorate C++ functions you want to expose to R with
[[cpp11::register]]. Note that this is a C++11 attribute, not a comment like is used in Rcpp.
cpp11 has no hard dependencies and does not use a shared library, so it is straightforward and reliable to use in packages.
Alternatively, you can vendor the current installed version of cpp11 headers into your package with
cpp11::vendor_cpp11(). This ensures the headers will remain unchanged until you explicitly update them.
See vignette(“cpp11”) to get started using cpp11 in your scripts, particularly if you are new to C++ programming.
Rcpp has been a widely successful project, however over the years a number of issues and additional C++ features have arisen. Adding these features to Rcpp would require a great deal of work, or in some cases would be impossible without severely breaking backwards compatibility.
cpp11 is a ground up rewrite of C++ bindings to R with different design trade-offs and features.
Changes that motivated cpp11 include:
See vignette(“motivations”) for full details on the motivations for writing cpp11.
See vignette(“converting”) if you are already familiar with Rcpp or have an existing package that uses Rcpp and want to convert it to use cpp11.
See vignette(“internals”) for details on the cpp11 implementation or if you would like to contribute to cpp11.
Please note that the cpp11 project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.