Import of pkgsrc-2015Q1

devel/R-Rcpp/DESCR

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+The Rcpp package provides R functions as well as a C++ library which
+facilitate the integration of R and C++.
+
+R data types (SEXP) are matched to C++ objects in a class hierarchy.
+All R types are supported (vectors, functions, environment, etc ...)
+and each type is mapped to a dedicated class. For example, numeric
+vectors are represented as instances of the Rcpp::NumericVector class,
+environments are represented as instances of Rcpp::Environment,
+functions are represented as Rcpp::Function, etc ... The
+"Rcpp-introduction" vignette provides a good entry point to Rcpp.
+
+Rcpp also provides Rcpp modules, a framework that allows exposing C++
+functions and classes to the R level. The "Rcpp-modules" vignette
+details the current set of features of Rcpp-modules.
+
+Rcpp includes a concept called Rcpp sugar that brings many R functions
+into C++. Sugar takes advantage of lazy evaluation and expression
+templates to achieve great performance while exposing a syntax that is
+much nicer to use than the equivalent low-level loop code. The
+"Rcpp-sugar" vignette gives an overview of the feature.
+
+Additional documentation is available via the paper by Eddelbuettel
+and Francois (2011, JSS) paper and the book by Eddelbuettel (2013,
+Springer); see 'citation("Rcpp")' for details.