Making a note here re: OS X #9
Description
fails hard even with the C++ YAML lib installed. Will post logs in a bit.
However…
Why not read the YAML file with R (via the yaml package) and pass an R data structure into Rcpp? It's not like the UA YAML file is huge (so it's not going to really save time) and it would remove something you'd no doubt have to make a download-and-install library as part of the pkg installation process (== ugh).
Also, an alternative to getting C++ regex working is to ask the stringi folks to expose a cpl functions directly (i.e. just use stringi regexes). I'll still keep poking at the example icu code you slack'd tho.