dots.RDevelopment notes - dots.R
Dots collectors like dots_list() are a little tricky because they
may error out in different situations. Do we want to forward the
context, i.e. set the call flag to the calling environment?
Collectors throw errors in these cases:
While checking their own parameters, in which case the relevant context is the collector itself and we don't forward.
While collecting the dots, during evaluation of the supplied
arguments. In this case forwarding or not is irrelevant because
expressions in ... are evaluated in their own environment
which is not connected to the collector's context.
While collecting the dots, during argument constraints checks
such as determined by the .homonyms argument. In this case we
want to forward the context because the caller of the dots
collector is the one who determines the constraints for its
users.