I don't really understand all the excitement here.
It's quick enough to define a function to do what you want, no?
R> NewYear <- as.Date("2013-01-01")
R> Easter <- Sys.Date()
R> cppFunction('double ddiff(Date a, Date b) { return a - b; }')
R> cppFunction('double ddiff2(Date a, Date b) { return b - a; }')
R> ddiff(NewYear, Easter)
[1] 89 ## I find this more logical
R> ddiff2(NewYear, Easter)
[1] -89 ## closer to R's difftime and 'odd' to me
R>
Dirk
--
Dirk Eddelbuettel | e...@debian.org | http://dirk.eddelbuettel.com
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