Nothing
useDplyr <- function() {
if (useDplyr <- getOption("dat.use.dplyr", FALSE)) {
if (!requireNamespace("dplyr", quietly = TRUE)) {
stop("option('dat.use.dplyr') is set to TRUE but the package can",
"not be loaded. Set option to FALSE and use data.table or install",
"dplyr.)")
}
}
useDplyr
}
.onAttach <- function(libname, pkgname) {
packageStartupMessage(
"To use dplyr as backend set 'options(dat.use.dplyr = TRUE)'."
)
}
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