Yes, I saw your details after I replied. There was a timestamp in the generated code that was interfering with people doing this. Now I think about it, I seem to remember that we already took that out.
I will take a look at this out of interest (unless you are going to Ter?) Jim From: [email protected] [mailto:[email protected]] On Behalf Of Ben McCann Sent: Wednesday, June 09, 2010 10:34 AM To: Terence Parr Cc: [email protected] Subject: Re: [antlr-dev] Non-deterministic output I'm not sure what you're referring to when you say timestamps. The issue is that the code comments keep changing. Would it be possible to just use a List instead of a Set? That should solve the issue. Thanks, Ben $ diff {/tmp/tmpaX6PX1,/tmp/tmp2-04O_}/JsonTemplateParser.java 307c307 < // elements: value, DOC_COMMENT, startCommand --- > // elements: startCommand, value, DOC_COMMENT 521c521 < // elements: DOC_COMMENT, entry, startCommand --- > // elements: startCommand, entry, DOC_COMMENT 1031c1031 < // elements: DOC_COMMENT, entry --- > // elements: entry, DOC_COMMENT 1161c1161 < // elements: DOC_COMMENT, key, value --- > // elements: key, value, DOC_COMMENT 1365c1365 < // elements: value, DOC_COMMENT --- > // elements: DOC_COMMENT, value On Wed, Jun 9, 2010 at 10:21 AM, Terence Parr <[email protected]> wrote: yeah, there are Sets in there. i wonder why (how?) java alters the order for same computation across runs. Come to think of it, i'm chasing something similar in ANTLR v4 unit tests. I thought it was static data somewhere but could be some weird Set thing. damn java. grr.... not sure how easily i can help you here... Ter On Jun 9, 2010, at 10:15 AM, Ben McCann wrote: We're using 3.2. The only thing I've noticed changing between runs thus far is the code comments. I should also mention the input is not changing at all. I'm guessing it's something along the lines of using an Iterator from a Set instead of List so that there's no ordering guarantee. Thanks, Ben On Wed, Jun 9, 2010 at 10:03 AM, Terence Parr <[email protected]> wrote: wow. that's weird. surely the grammar changes between runs? Computers are usually good about determinism ;) What version of antlr? Ter On Jun 8, 2010, at 9:52 PM, Ben McCann wrote: Hi, It appears that ANTLR is generating varying output between runs. This causes problems for us when trying to diff to see if anything has changed. Could someone file a bug for this? I was not able to register for the JIRA. Thanks, Ben McCann Software Engineer Google Inc. $diff ~/PathParser.java.1 ~/PathParser.java.2 560c560 < // elements: Variable, expr --- > // elements: expr, Variable _______________________________________________ antlr-dev mailing list [email protected] http://www.antlr.org/mailman/listinfo/antlr-dev
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