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

// Copyright © SixtyFPS GmbH <info@sixtyfps.io>
// SPDX-License-Identifier: (GPL-3.0-only OR LicenseRef-SixtyFPS-commercial)

X := Rectangle {

    x: 42phx;
    x: 32phx;
//  ^error{Duplicated property binding}
    width: 12phx;
    width <=> self.height;
//  ^error{Duplicated property binding}

    not_exist <=> 12phx;
//  ^error{Unknown property not-exist in Rectangle}

    property <int> foo: 12;
    foo: 13;
//  ^error{Duplicated property binding}


}