On 09/25/2010 02:12 PM, Arthur Perry wrote:
> I am getting the same error - did you ever figure out the issue?
In Bernt's example below, prog is an empty rule. Not a good idea.
Probably deserving of a better error message though.
If this is specific to the python project, you'd have to get an answer
from one of the Python maintainers.
> Art
>
>
>> ---- bernt wrote: ----
>>
>> When executing the command:
>>
>> java -cp antlrworks-1.2.2.jar org.antlr.Tool Expr.g
>>
>> on a minimal Expr.g file (and any other grammar file with language=Python):
>> ---
>> grammar Expr;
>> options {
>> language=Python;
>> }
>>
>> prog:;
>> ---
>>
>> the following happens:
>>
>> - the tool exits with error code 1, and writes an error message to the
>> console:
>> ANTLR Parser Generator Version 3.1.1
>> error(10): internal error: eval tree parse error : <AST>:0:0:
>> unexpected AST node:
>>
>> org.antlr.stringtemplate.language.ActionEvaluator.expr(Unknown Source)
>> ...
>> ...
>> org.antlr.Tool.main(Unknown Source)
>>
>> - but the ExprParser.py file is generated just fine.
>>
>>
>> Is there something wrong in org.antlr.Tool? Or am I doing something wrong?
>>
>> Regards,
>> Bernt
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Kevin J. Cummings
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