On Wed, 7 Mar 2007, Aubrey Jaffer wrote:
A pure interpreter like SCM interprets LET, LET*, LETREC, DO, COND,
CASE, and QUASIQUOTE directly; they are not rewritten in terms of
LAMBDA, IF, and BEGIN.
But your code rewrites these constructs in terms of LAMBDA, IF, and
BEGIN. So it is compiling R6RS to some subset of Scheme, which would
bypass the optimizations SCM has for the derived constructs and reduce
its speed.
It is extremely trivial to modify my expander to target a different or larger
set of primitive forms.
Andre
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