public final EsperParser.whileloop_return whileloop() throws RecognitionException {
        EsperParser.whileloop_return retval = new EsperParser.whileloop_return();
        retval.start = input.LT(1);


        Object root_0 = null;

        Token ENDWHILE54=null;
        EsperParser.while__return while_53 =null;


        Object ENDWHILE54_tree=null;

        try {
            // C:\\Users\\Alex\\Dropbox\\EclipseWorkspace\\esper-compiler\\src\\compiler\\Esper.g:65:11: ( while_ ENDWHILE )
            // C:\\Users\\Alex\\Dropbox\\EclipseWorkspace\\esper-compiler\\src\\compiler\\Esper.g:65:13: while_ ENDWHILE
            {
            root_0 = (Object)adaptor.nil();


            pushFollow(FOLLOW_while__in_whileloop663);
            while_53=while_();

            state._fsp--;

            adaptor.addChild(root_0, while_53.getTree());

            ENDWHILE54=(Token)match(input,ENDWHILE,FOLLOW_ENDWHILE_in_whileloop665); 
            ENDWHILE54_tree = 
            (Object)adaptor.create(ENDWHILE54)
            ;
            adaptor.addChild(root_0, ENDWHILE54_tree);


            }

            retval.stop = input.LT(-1);


            retval.tree = (Object)adaptor.rulePostProcessing(root_0);
            adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop);

        }
        catch (RecognitionException re) {
            reportError(re);
            recover(input,re);
    	retval.tree = (Object)adaptor.errorNode(input, retval.start, input.LT(-1), re);

        }

        finally {
        	// do for sure before leaving
        }
        return retval;
    }