Typed Racket
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Sam Tobin-Hochstadt 2669a3269a Fix abstraction of implications.
Fix contract for lookup-typed/lexical.
Default cases for printing.
Abstract out indexing functions for Nat/Integer split.

svn: r17272

original commit: d0c8a19ce84ce1ef674c1c43e69b56ee7e0a63a2
2009-12-11 23:00:37 +00:00
collects Fix abstraction of implications. 2009-12-11 23:00:37 +00:00