I understand why the following happens ($.proto delegates to get, which ascends the parent hierarchy up to globalenv()), but I still find it anti-intuitive:
> z <- 1 > y <- proto(a=2) > y$z [1] 1 Although this is well-documented behavior; wouldn't it uphold the principle of least surprise to inherit instead from baseenv() or emptyenv()? (See attached patch.) Spurious parent definitions have already been the source of bizarre bugs, prompting me to use proto like this: > z <- 1 > y <- proto(baseenv(), a=2) > y$z Error in get(x, env = this, inherits = inh) : object 'z' not found It's cumbersome, but it ensures that parent definitions don't pollute my object space; I would rather that be the default behaviour, though. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
