Wed Mar 19 16:40:59 EDT 2008

parsing words

what about this: all scheme transformers are unary functions. nothing
prevents me though to add binary functions to the transformer
environment. these could then be reserved for calls from within
'next', because they don't fit the scheme transformer type.

this so, because it's illegal to call them directly anyway: they use
dynamic state set by the compiler macros.

this seems to work pretty well.