Initial file

lexical-scoping-test.scm

@@ -0,0 +1,19 @@
+(import (scheme base) (scheme write))
+
+;; Fails when compiling compiler benchmark:
+(define (proper-length l)
+  (define (length l n)
+    (cond ((pair? l) (length (cdr l) (+ n 1))) ((null? l) n) (else #f)))
+  (length l 0))
+
+
+;; One possible idea, alpha conversion could maintain a local lexical environment, "locals"
+;; and use that to rename identifiers that clash with primitives.
+;; Might be able to use a list of hash tables (or alists) for this purpose.
+;; Just load up a new list when a new scope is encountered, and add any
+;; "define", "set!", or "lambda" variables to it. then if a ref is a
+;; local, we need to rename it
+;; TODO: can we use same environments as "eval" uses for this? makes
+;; sense not to reinvent things
+
+(write (proper-length '(a b c)))