[antlr-interest] Sorry, one more try, now with more information…

[Jean Bovet]

There is indeed a problem in ANTLRWorks. This will be fixed for the  
next release. In the meantime, you can use the following workaround:  
save the project to the disk and it will work fine.

Regards,

Jean

On Dec 1, 2008, at 2:46 PM, Philip Mötteli wrote:

> Hi,
>
>
> I'm a complete newbie to ANTLR and so I thought to start with the
> simple 'Expression Evaluator Tutorial'. I downloaded the most recent
> version of ANTLRworks for Mac OS X (I run the most recent version
> 10.5.5), pasted the grammar into the editor, picked 'prog', entered
> '2+3*4' and pressed start. Instead of building the parse tree,
> ANTLRworks just says: "The interpreter does not run actions nor
> evaluate syntactic predicates. Use the debugger if you want to use
> these ANTLR features." Apart from the fact, that I wonder what the
> interpreter then would like to do, I can't enter anything in the
> debugger. The panes don't accept input.
>
> Can anybody explain a newbie what he should do?
>
>
> Thanks
> Phil
>
>
> BTW: This is the console output:
>
> java.lang.NullPointerException
> 	at org.antlr.xjlib.foundation.XJUtils.concatPath(Unknown Source)
> 	at org.antlr.xjlib.foundation.XJUtils.concatPath(Unknown Source)
> 	at
> org
> .antlr
> .works.components.editor.ComponentEditorGrammar.getOutputPath(Unknown
> Source)
> 	at
> org
> .antlr
> .works.components.editor.ComponentEditorGrammar.getANTLRTool(Unknown
> Source)
> 	at
> org.antlr.works.grammar.engine.GrammarEngineImpl.getANTLRTool(Unknown
> Source)
> 	at
> org
> .antlr
> .works.grammar.antlr.ANTLRGrammarEngineImpl.createNewGrammar(Unknown
> Source)
> 	at
> org
> .antlr
> .works
> .grammar.antlr.ANTLRGrammarEngineImpl.createParserGrammar(Unknown
> Source)
> 	at
> org
> .antlr
> .works
> .grammar.antlr.ANTLRGrammarEngineImpl.createCombinedGrammar(Unknown
> Source)
> 	at
> org
> .antlr
> .works.grammar.antlr.ANTLRGrammarEngineImpl.createGrammars(Unknown
> Source)
> 	at
> org.antlr.works.grammar.antlr.ANTLRGrammarEngineImpl.analyze(Unknown
> Source)
> 	at org.antlr.works.grammar.engine.GrammarEngineImpl.analyze(Unknown
> Source)
> 	at org.antlr.works.interpreter.EditorInterpreter.run(Unknown Source)
> 	at java.lang.Thread.run(Thread.java:613)
>
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