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grammar t057autoAST40;
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options {language=JavaScript;output=AST;}
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a returns [result]: x+=b x+=b {
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t=$x[1]
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$result = "2nd x="+t.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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