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Maciej Stachowiak wrote: > > In my opinion, it's a bad idea to expose the fact that Guile > implements variables as pairs to the user level. I suspect this > representation might change for certain classes of variables at least > when it comes time to tune Guile for speed. > The interface says nothing about the fact that variables are actually two pairs. All it says is to bind a variable to the pair. The action of variable-set! is then to modify the cdr of the pair. How that is done is not revealed. :) (Maybe I should be a lawyer). In this case its trivial because the actual storage is a pair. By creating this interface it becomes trivial to write evals (in Guile, not C) that work over association lists, which is primarily what I need. Wade