[antlr-interest] Examples of semantic predicates with extremely long generated code
Sam Harwell
sharwell at pixelminegames.com
Mon Apr 4 10:23:40 PDT 2011
For the example at the bottom of ANTLR-245, I get the following condition in
args, element, and element2 (respectively):
!((((true)||(false))))
!((false))
!((true))
The tool doesn't have target language analysis, so true and false here might
as well be X and Y.
I'll work on getting this into the Java version after some more testing.
Sam
-----Original Message-----
From: antlr-interest-bounces at antlr.org
[mailto:antlr-interest-bounces at antlr.org] On Behalf Of Terence Parr
Sent: Monday, April 04, 2011 12:02 PM
To: antlr-interest Interest
Subject: Re: [antlr-interest] Examples of semantic predicates with extremely
long generated code
Looks like I have three different bugs entered
http://www.antlr.org/jira/browse/ANTLR-393
http://www.antlr.org/jira/browse/ANTLR-430
http://www.antlr.org/jira/browse/ANTLR-245
I recall that at least one of them had a small example.
T
On Apr 4, 2011, at 9:58 AM, Sam Harwell wrote:
> Hi everyone,
>
> For certain cases of semantic predicates, ANTLR generates some
> *extremely* long, complicated, and redundant conditionals in the
> output code. I've been working on resolving this issue, and I'm
> looking for some examples of these grammars to make sure my updates
> properly reduce these conditionals. Does anyone have a sample they can
send me?
>
> Thanks!
> Sam
>
>
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