Hi,
I was wondering if it is a good idea to delay the evaluation of expression
within invisible(), just like data()/delayedAssign()?
The idea is a function might return an invisible object. This object might not
be used by the users if the function returns are not assigned nor passed to
another function call. For example,
f <- function() {
# do something eagerly
return(invisible({
# calculate message that might take long/extra memory, but only useful if
printed out
}))
}
If `f()` is not immediately assigned to a variable, then there is no reason to
evaluate invisible(…).
This idea is somewhere between `delayedAssign` and eager evaluation. Maybe we
could call it delayedInvisible()?
Best,
- Zhengjia
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