Re-examine assumption that we need bottom-up parsing about alchemy HOT 1 CLOSED

After thinking further, the original point remains valid. Being able to backtrack to handle a rewrite presupposes that the parser was able to recognize the rewrite rule at all, which in general is not the case without the aforementioned inverse function/production analysis, or equivalently manual language design that explicitly includes rewrite possibilities in top-down recognition. I don't think this is acceptable; it is still much easier to do the parse bottom-up and introduce stack-like semantics on top of that algorithm.

from alchemy.