Hi,
I'm trying to implement an abort() method that works just like stop()
but does not signal the condition such that try() and tryCatch(...,
condition=...) are, contrary to stop(), effectively non-working with
abort() calls.
In order to achieve this, I stumbled upon invokeRestart("abort"), cf.
help("invokeRestart", package="base") that reads "Restarts are used
for establishing recovery protocols. They can be established using
withRestarts. One pre-established restart is an abort restart that
represents a jump to top level.".
So, my current implementation is (roughly):
abort <- function(...) {
# handling messages etc
# Fully abort the R evaluation and return to the top level
invokeRestart("abort")
}
I've tested it in various setups with and without tryCatch(...,
condition=...) and so on and it appears to work. Does anyone know if
I'm overlooking something or can I count on invokeRestart("abort") to
always stop any currently evaluated R code?
Also, does anyone know how far back (in R versions) invokeRestart("abort") goes?
Thxs,
Henrik
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