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.
See vignette("cpp11") to get started using cpp11.
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 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:
- Enforcing copy-on-write semantics.
- Improving the safety of using the R API from C++ code.
- Supporting ALTREP objects.
- Using UTF-8 strings everywhere.
- Applying newer C++11 features.
- Having a more straightforward, simpler implementation.
- Faster compilation time with lower memory requirements.
- Being completely header only to avoid ABI issues.
- More robust protection using a much more efficient linked list data structure.
- Growing vectors more efficiently.
See vignette("motivations") for full details on the motivations for writing cpp11.
Conversion from Rcpp
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.
cpp11 would not exist without Rcpp. Thanks to the Rcpp authors, Dirk Eddelbuettel, Romain Francois, JJ Allaire, Kevin Ushey, Qiang Kou, Nathan Russell, Douglas Bates and John Chambers for their work writing and maintaining Rcpp.