/* LICENSE BEGIN
    This file is part of the SixtyFPS Project -- https://sixtyfps.io
    Copyright (c) 2021 Olivier Goffart <olivier.goffart@sixtyfps.io>
    Copyright (c) 2021 Simon Hausmann <simon.hausmann@sixtyfps.io>

    SPDX-License-Identifier: GPL-3.0-only
    This file is also available under commercial licensing terms.
    Please contact info@sixtyfps.io for more information.
LICENSE END */

Xxx := Rectangle {

    foo := Rectangle {
        callback hello(int) -> int;
    }

    callback plop(int) -> int <=> foo.hello;
    //                        ^error{When declaring a callback alias, one must omit parentheses. e.g. 'callback foo <=> other.bar;'}

    callback plopsi() <=> foo.hello;
    //                ^error{When declaring a callback alias, one must omit parentheses. e.g. 'callback foo <=> other.bar;'}

}