[Rcpp-devel] Rcpp 0.10.0

2. If my package already has a namespace named ernm, is an extra one
wrapped around it, so that extending packages would have to use
ernm::ernm::bar()?

No, the generated header file for a package exports functions within the
package namespace but that doesn't preclude other headers from exporting
other types in the same namespace.

3. Just to be clear? this removes the need to make an inline plug-in

because you can just use cppFunction(depends="**MyPacakge",?) with no
additional glue except for the interface statement.

quite the opposite, // [[Rcpp::depends("myPackage")]] uses the inline
plugin as a way to gather information about includes, libraries, ... you
need it.

A clarification here: if your package exposes a header-only interface then
Rcpp::depends will take care of adding your package's include directory to
the sourceCpp compilation (but users of course still need to do e.g.
#include <ernm.h>). For this scenario no inline plugin is needed.

However, for cppFunction it's not enough to just add the include path, we
also need the header(s). For that case you should create a simple inline
plugiln (which you can likely create with a one-liner by calling
Rcpp.plugin.maker).
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