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


        Object root_0 = null;

        Token ASSIGN24=null;
        Token IDENTIFIER25=null;
        EsperParser.expr_return expr26 =null;


        Object ASSIGN24_tree=null;
        Object IDENTIFIER25_tree=null;

        try {
            // C:\\Users\\Alex\\Dropbox\\EclipseWorkspace\\esper-compiler\\src\\compiler\\Esper.g:45:8: ( ASSIGN ^ IDENTIFIER expr )
            // C:\\Users\\Alex\\Dropbox\\EclipseWorkspace\\esper-compiler\\src\\compiler\\Esper.g:45:10: ASSIGN ^ IDENTIFIER expr
            {
            root_0 = (Object)adaptor.nil();


            ASSIGN24=(Token)match(input,ASSIGN,FOLLOW_ASSIGN_in_assign364); 
            ASSIGN24_tree = 
            (Object)adaptor.create(ASSIGN24)
            ;
            root_0 = (Object)adaptor.becomeRoot(ASSIGN24_tree, root_0);


            IDENTIFIER25=(Token)match(input,IDENTIFIER,FOLLOW_IDENTIFIER_in_assign367); 
            IDENTIFIER25_tree = 
            (Object)adaptor.create(IDENTIFIER25)
            ;
            adaptor.addChild(root_0, IDENTIFIER25_tree);


            pushFollow(FOLLOW_expr_in_assign369);
            expr26=expr();

            state._fsp--;

            adaptor.addChild(root_0, expr26.getTree());

            }

            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;
    }