Doc: Add required include statement for qmlRegisterSingletonType docs

Adds a missing include for QtQml into QQmlEngine class reference code
snippets.

Task-number: QTBUG-30642
Change-Id: I2ec10de5b31b4854d5aaea08987b9d75926d2ef4
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/src/qml/doc/src/qmlfunctions.qdoc b/src/qml/doc/src/qmlfunctions.qdoc
index 4a4de0531c..5db275407d 100644
--- a/src/qml/doc/src/qmlfunctions.qdoc
+++ b/src/qml/doc/src/qmlfunctions.qdoc
@@ -222,7 +222,7 @@
 
    Usage:
    \code
-   // first, define the singleton type provider function (callback).
+   // First, define the singleton type provider function (callback).
    static QJSValue *example_qjsvalue_singletontype_provider(QQmlEngine *engine, QJSEngine *scriptEngine)
    {
        Q_UNUSED(engine)
@@ -233,7 +233,8 @@
        return example;
    }
 
-   // second, register the singleton type provider with QML by calling this function in an initialization function.
+   // Second, register the singleton type provider with QML by calling this function in an initialization function.
+   #include <QtQml>
    ...
    qmlRegisterSingletonType("Qt.example.qjsvalueApi", 1, 0, "MyApi", example_qjsvalue_singletontype_provider);
    ...
@@ -299,7 +300,7 @@
 
    Usage:
    \code
-   // first, define your QObject which provides the functionality.
+   // First, define your QObject which provides the functionality.
    class SingletonTypeExample : public QObject
    {
        Q_OBJECT
@@ -325,7 +326,7 @@
        int m_someProperty;
    };
 
-   // second, define the singleton type provider function (callback).
+   // Second, define the singleton type provider function (callback).
    static QObject *example_qobject_singletontype_provider(QQmlEngine *engine, QJSEngine *scriptEngine)
    {
        Q_UNUSED(engine)
@@ -335,7 +336,8 @@
        return example;
    }
 
-   // third, register the singleton type provider with QML by calling this function in an initialization function.
+   // Third, register the singleton type provider with QML by calling this function in an initialization function.
+   #include <QtQml>
    ...
    qmlRegisterSingletonType<SingletonTypeExample>("Qt.example.qobjectSingleton", 1, 0, "MyApi", example_qobject_singletontype_provider);
    ...