From: Mark Raynsford <list+org.sourceware.kawa@io7m.com>
To: kawa@sourceware.org
Subject: Difference in define behaviour between kawa.jar and embedded Scheme example
Date: Wed, 22 Nov 2017 22:33:00 -0000 [thread overview]
Message-ID: <20171122223308.6b39e57d@copperhead.int.arc7.info> (raw)
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I have the following trivial example:
https://raw.githubusercontent.com/io7m/kawa-experiments/develop/src/main/resources/com/io7m/kawa_exp/demo0.scm
If I evaluate it on the command line:
$ java -jar kawa-3.0/lib/kawa.jar
#|kawa:1|# (define (six0 x) (+ 3 3))
#|kawa:2|# (define (+ x y) (* x y))
#|kawa:3|# (define (six1 x) (+ 3 3))
#|kawa:4|# (six0 0)
6
#|kawa:5|# (six1 0)
9
This is the behaviour I'd expect. If I then try (what appears to be)
the same thing from Java:
https://raw.githubusercontent.com/io7m/kawa-experiments/develop/src/main/java/com/io7m/kawa_exp/SchemeExp0.java
The program prints:
22:30:02.499 [main] DEBUG com.io7m.kawa_exp.SchemeExp0 - result: 9, 9
In other words, the redefinition of + on the second line is affecting
the existing definition of six0 so that the applications of six0 and
six1 are both returning 9. What's going on here?
This is an unmodified kawa jar from the 3.0 binary distribution.
--
Mark Raynsford | http://www.io7m.com
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next reply other threads:[~2017-11-22 22:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-22 22:33 Mark Raynsford [this message]
2017-11-23 2:26 ` Per Bothner
2017-11-23 10:52 ` Mark Raynsford
2017-11-23 12:51 ` Per Bothner
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