slint/sixtyfps_compiler/tests/syntax/basic/self_assign.60

/* LICENSE BEGIN
    This file is part of the SixtyFPS Project -- https://sixtyfps.io
    Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
    Copyright (c) 2020 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 */
SuperSimple := Rectangle {
    TouchArea {
        clicked => { root.x += 1phx; }
    }
    TouchArea {
        clicked => { x += 1phx; }
    }
    TouchArea {
        clicked => { 12 += 1; }
//                   ^error{Self assignment needs to be done on a property}
    }
    TouchArea {
        clicked => { x += "string"; }
//                       ^error{Cannot convert string to length}
    }

    TouchArea {
        clicked => { doesnotexist += 24; }
//                   ^error{Unknown unqualified identifier 'doesnotexist'}
    }

}