别名周期

import QtQuick

Item {
    id: someId
    property alias myself: someId.myself // not ok: referring to itself

    property alias cycle: someId.cycle2 // not ok: indirectly referring to itself
    property alias cycle2: someId.cycle

    property alias indirect: someId.cycle // not ok: referring to alias indirectly referring to itself
}

import QtQuick

Item {
    id: someId
    Item {
        id: anotherId
        property string myself
        property int cycle
    }
    property alias myself: anotherId.myself // ok: referring to a property

    property alias cycle: someId.cycle2 // ok: does not refer to itself anymore
    property alias cycle2: anotherId.cycle // ok: not a cycle anymore

    property alias indirect: someId.cycle // ok: cycle does not form an alias cycle anymore
}