[R-pkg-devel] Absent variables and tibble

[Duncan Murdoch]

I've now added a simple implementation of hasName to R-devel and 
R-patched.  When I find the time, I'll go through the base packages and 
change the !is.null(x$name) idiom to hasName.  (All but "base", that 
is:  hasName is in utils, and it is better if base remains self-contained.)

If any bottlenecks turn up, I could make hasName faster by redoing it in 
C code, but so far it is just R code very similar to the %in% 
implementation.

Duncan Murdoch