non-syntactic argument names in usage

[yihui]

For example, the usage should be f(_x) for the function below, but roxygen2 stripped off the backticks for some reason:

roc <- roxygen2:::rd_roclet()
out <- roxygen2:::roc_proc_text(roc, "
    #' Title.
    f <- function(`_x`) 1")[[1]]
roxygen2:::get_tag(out, "usage")$values
# <rd> f(_x)

[hadley]

Thanks - I'll take a look. They're probably getting lost because somewhere I'm doing deparse(quote(_x)) instead of deparse(quote(_x), backtick = TRUE)