1grammar t057autoAST42;
2options {language=JavaScript;output=AST;}
3a returns [result] : x+=b! x+=b {
4$result = "1st x="+$x[0].toStringTree()+',';
5} ;
6b : ID;
7ID : 'a'..'z'+ ;
8INT : '0'..'9'+;
9WS : (' '|'\n') {$channel=HIDDEN;} ;
10