FILE | R Documentation |
FILE()
and LINE()
are intended to be used in a similar manner
to the macros __FILE__
and __LINE__
in C. They are useful for
generating a diagnostic message / / warning / / error to about the status of
the program.
FILE()
LINE()
FILE.R <- tempfile(fileext = ".R")
writeLines("fun <- function ()
{
message(sprintf('invalid value %d at %s, line %d',
-1, FILE(), LINE()))
}
", FILE.R)
source(FILE.R, verbose = FALSE, keep.source = TRUE)
fun()
unlink(FILE.R)
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