[antlr-interest] (unknown)

SAGAR BIYANI sagarbiyani at yahoo.com
Tue Feb 26 05:01:04 PST 2002


Hi ,
	I am writing an grammar file for SQL commands. 
I have extended the same grammar for some other
purpose. Now during
generating 
the code for derived lexer and parser classes it is
throwing following
error. 

#$%%*&@# internal error:
java.lang.NullPointerException
[complain to nearest government official
 or send hate-mail to parrt at jguru.com;
 please send stack trace with report.]

java.lang.NullPointerException
        at java.util.Hashtable.get(Hashtable.java:320)
        at
antlr.SimpleTokenManager.getTokenSymbol(SimpleTokenManager.java:84)
        at
antlr.SimpleTokenManager.getTokenSymbolAt(SimpleTokenManager.java:89)
        at
antlr.JavaCodeGenerator.getValueString(JavaCodeGenerator.java:3046)
        at
antlr.JavaCodeGenerator.getRangeExpression(JavaCodeGenerator.java:3032)
        at
antlr.JavaCodeGenerator.getLookaheadTestTerm(JavaCodeGenerator.java:2991)
        at
antlr.JavaCodeGenerator.getLookaheadTestExpression(JavaCodeGenerator.java:29
47)
        at
antlr.JavaCodeGenerator.getLookaheadTestExpression(JavaCodeGenerator.java:29
73)
        at
antlr.JavaCodeGenerator.genCommonBlock(JavaCodeGenerator.java:1644)
        at
antlr.JavaCodeGenerator.gen(JavaCodeGenerator.java:533)
        at
antlr.OneOrMoreBlock.generate(OneOrMoreBlock.java:21)
        at
antlr.JavaCodeGenerator.genAlt(JavaCodeGenerator.java:1190)
        at
antlr.JavaCodeGenerator.genRule(JavaCodeGenerator.java:2503)
        at
antlr.JavaCodeGenerator.gen(JavaCodeGenerator.java:693)
        at
antlr.ParserGrammar.generate(ParserGrammar.java:28)
        at
antlr.JavaCodeGenerator.gen(JavaCodeGenerator.java:111)
        at antlr.Tool.doEverything(Tool.java:254)
        at antlr.Tool.main(Tool.java:390)

Is is a bug ? Any help on this will be greatly
appreciated.

Thanks,
Sagar


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