I'm writing some C++ components for my R package using RcppEigen and I'm having trouble using typedefs in this context. The following code won't compile:
// [[Rcpp::depends(RcppEigen)]] #include <RcppEigen.h> using namespace Rcpp; typedef Eigen::ArrayXd MapAr1; // [[Rcpp::export]] MapAr1 myFun(const MapAr1& x){ MapAr1 y = x; y[0] = 0; return y; } Here is the error:
==> Rcpp::compileAttributes() * Updated src/RcppExports.cpp * Updated R/RcppExports.R ==> devtools::document(roclets=c('rd', 'collate', 'namespace')) Updating my_package documentation Loading my_package Re-compiling my_package '/usr/lib64/R/bin/R' --no-site-file --no-environ --no-save --no-restore \ --quiet CMD INSTALL '/my_path/my_package' \ --library='/tmp/RtmpgPjAdf/devtools_install_125071da0b53' --no-R --no-data \ --no-help --no-demo --no-inst --no-docs --no-exec --no-multiarch \ --no-test-load * installing *source* package ‘my_package’ ... g++ -m64 -I/usr/include/R -DNDEBUG -I/usr/local/include -I"/my_path/R/x86_64-redhat-linux-gnu-library/3.3/Rcpp/include" -I" /my_path/R/x86_64-redhat-linux-gnu-library/3.3/RcppEigen/include" -fpic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -c RcppExports.cpp -o RcppExports.o ** libs RcppExports.cpp:10:1: error: ‘MapAr1’ does not name a type MapAr1 myFun(const MapAr1& x); ^ RcppExports.cpp: In function ‘SEXPREC* my_package_myFun(SEXP)’: RcppExports.cpp:15:42: error: ISO C++ forbids declaration of ‘type name’ with no type [-fpermissive] Rcpp::traits::input_parameter< const MapAr1& >::type x(xSEXP); ^ RcppExports.cpp:15:50: error: template argument 1 is invalid Rcpp::traits::input_parameter< const MapAr1& >::type x(xSEXP); ^ RcppExports.cpp:15:58: error: expected initializer before ‘x’ Rcpp::traits::input_parameter< const MapAr1& >::type x(xSEXP); ^ RcppExports.cpp:16:40: error: ‘x’ was not declared in this scope rcpp_result_gen = Rcpp::wrap(myFun(x)); ^ RcppExports.cpp:16:41: error: ‘myFun’ was not declared in this scope rcpp_result_gen = Rcpp::wrap(myFun(x)); ^ make: *** [RcppExports.o] Error 1 ERROR: compilation failed for package ‘my_package’ * removing ‘/tmp/RtmpgPjAdf/devtools_install_125071da0b53/my_package’ Error: Command failed (1) Execution halted Exited with status 1. The same code compiles outside the package. So I'm guessing that something is not copied properly to the RcppExports files. I also noticed a similar problem when trying to use the RcppEigen namespace: using namespace RcppEigen; is not copied.
Any idea how to solve this without modifying RcppExports by hand? Thanks!
