grammar t053heteroT5; options { language=JavaScript; output=AST; } @header { function V() { V.superclass.constructor.apply(this, arguments); }; org.antlr.lang.extend(V, org.antlr.runtime.tree.CommonTree, { toString: function() { return this.getText() + ""; } }); } a : x+=ID^ ; ID : 'a'..'z'+ ; WS : (' '|'\n') {$channel=HIDDEN;} ;