[plt-scheme] polymorphism of primitive types

From: Yoav Goldberg (yoav.goldberg at gmail.com)
Date: Tue Oct 18 12:28:12 EDT 2005

What is "shared"?
It seems to be defined in (lib "shared.ss"), yet it is available
without requiring it.
Also, how come following code works?
;;; =============================
(module redefine-syntax mzscheme
  (provide (rename my-shared shared))
  (define my-shared 'different-shared))

(module foo mzscheme
  (require redefine-syntax)
  (display shared))

(require foo)
;;; =============================


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