access-singleton-via-object.qdoc

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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
 
/*!
\ingroup qmllint-warnings-and-errors
 
\title Cannot access singleton as a property of an object
\brief [access-singleton-via-object] A singleton was incorrectly accessed.
 
\qmllintwarningcategory access-singleton-via-object
 
\section1 Access singleton via object
 
\section2 What happened?
You accessed a singleton using the syntax for accessing attached properties
from a namespace.
 
\section2 Why is this bad?
Singletons can't be accessed in this way. The expression will evaluate to undefined.
 
\section2 Example
\qml
import QtQml
import QtQuick as QQ
 
QtObject {
    id: root
    // Cannot access singleton as a property of an object. Did you want to access an attached object?
    property var singletonAccess: root.QQ.Application.platform
}
\endqml
 
To fix this warning, remove the \c{id} or property in front of the namespace if
you intended to use the singleton. Alternatively, check for typos if you wanted
to access an attached property.
 
\qml
import QtQml
import QtQuick as QQ
 
QtObject {
    id: root
    property var singletonAccess: QQ.Application.platform
    property bool attachedPropertyAccess: root.QQ.ListView.isCurrentItem
}
\endqml
*/