[antlr-interest] Basic question : howto differantiate value/pair combination

[Bruno Delzant]

Hi,

I am new to ANTLR and I am stuck with a basic problem I think.

Here is my grammar file:

<!--
class TestParser extends Parser;

startRule        : arg (SEPARATOR arg)* ;
arg              : ID EQ VALUE ;

class TestLexer extends Lexer;

protected UPPER  : ('A'..'Z');
protected LOWER  : ('a'..'z');
protected LETTER : (LOWER | UPPER);
protected DIGIT  : ('0'..'9');

ID     : UPPER (LETTER | DIGIT)* ;
VALUE  : (LETTER | DIGIT)+ ;

protected ID_OR_VALUE : (ID EQ) => ID { $setType(ID); }
                      | (ID) => VALUE { $setType(VALUE); };

EQ          : '=';
SEPARATOR   : ','|';'|' ';

-->

I always get the error :

<!--
ANTLR Parser Generator   Version 2.7.3   1989-2004 jGuru.com
test.g: warning:lexical nondeterminism between rules ID and VALUE upon
test.g:     k==1:'A'..'Z'
-->

Did I miss something ?
How can I differantiate an ID from a VALUE ?

Thanks already for any help.

Bruno




 
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