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From: | Arthur A. Gleckler |
Subject: | [Bug-mit-scheme] [bug #27426] Hygiene is broken in `syntax-rules'. |
Date: | Fri, 11 Sep 2009 17:46:47 +0000 |
User-agent: | Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_8; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/4.0.207.0 Safari/532.0 |
URL: <http://savannah.gnu.org/bugs/?27426> Summary: Hygiene is broken in `syntax-rules'. Project: MIT/GNU Scheme Submitted by: aag Submitted on: Fri 11 Sep 2009 05:46:46 PM GMT Category: runtime Severity: 3 - Normal Priority: 5 - Normal Item Group: Incorrect behavior Status: None Privacy: Public Assigned to: None Originator Name: Originator Email: Open/Closed: Open Discussion Lock: Any Keywords: _______________________________________________________ Details: >From Brian Mastenbrook's message on <r6rs-discuss> (<http://lists.r6rs.org/pipermail/r6rs-discuss/2009-September/005152.html>): MIT Scheme's implementation of hygiene is broken: 1 ]=> (define-syntax a (syntax-rules () ((_) (begin (define-syntax b (syntax-rules () ((_) 1))) (define-syntax c (syntax-rules () ((_) 2))))))) ;Value: a 1 ]=> (a) ;Unspecified return value 1 ]=> (b) ;Value: 1 _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?27426> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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