r - find all functions (including private) in a package

Question

I know ls("package:grid") and find.funs("package:grid") in mvbutils but apparently neither of them can find non-exported functions and methods that are only accessible internally or with ::: or getAnywhere.

I've had to source the files in the /R directory of the source package and use ls() on a clean global environment, but there must be a better way, no?

Answer 1

you can use asNamespace:

> methods(cbind)
[1] cbind.data.frame cbind.grobGrid   cbind.ts*       

   Non-visible functions are asterisked
> r <- unclass(lsf.str(envir = asNamespace("stats"), all = T))
> r[grep("cbind.ts", r)]
[1] ".cbind.ts" "cbind.ts" 

cbind.ts in stats package is invisible but can find in envir = asNamespace("stats").