It would be nice to have a general way to transform expressions of the form:

tryCatch(stop("!"), error = function(e) "An error")

The obvious transformation:

stop("!") %>% 
   tryCatch(error = function(e) "An error")

doesn't work because arguments in a pipeline are evaluated in sequence.

I no longer understand how the internals of magrittr work, but I wonder if it might be possible to use delayedAssign() to overcome this problem.