Typed Racket
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Sam Tobin-Hochstadt 297a5745a6 Fix polymorphic structure predicates.
svn: r14483

original commit: 929dc1d5b245e03d59eba55989c42c1a3e91954a
2009-04-10 00:07:11 +00:00
collects Fix polymorphic structure predicates. 2009-04-10 00:07:11 +00:00