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grammar t057autoAST42;
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options {language=JavaScript;output=AST;}
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a returns [result] : x+=b! x+=b {
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$result = "1st x="+$x[0].toStringTree()+',';
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} ;
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b : ID;
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ID : 'a'..'z'+ ;
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INT : '0'..'9'+;
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WS : (' '|'\n') {$channel=HIDDEN;} ;
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