Implement implicit constructors for built-in classes.

Change-Id: I6b0b104bc1da3252d014615c50b81830de42e722
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

7 files changed, 266 insertions, 0 deletions

diff --git a/src/corelib/kernel/qvariant.cpp b/src/corelib/kernel/qvariant.cpp
index 9b1c444db9..6ec8ef8870 100644
--- a/src/corelib/kernel/qvariant.cpp
+++ b/src/corelib/kernel/qvariant.cpp
@@ -1228,6 +1228,48 @@ QVariant::QVariant(const char *val)
 */
 
 /*!
+    \since 5.0
+    \fn QVariant::QVariant(const QUuid &val)
+
+    Constructs a new variant with an uuid value, \a val.
+*/
+
+/*!
+    \since 5.0
+    \fn QVariant::QVariant(const QModelIndex &val)
+
+    Constructs a new variant with an modelIndex value, \a val.
+*/
+
+/*!
+    \since 5.0
+    \fn QVariant::QVariant(const QJsonValue &val)
+
+    Constructs a new variant with a json value, \a val.
+*/
+
+/*!
+    \since 5.0
+    \fn QVariant::QVariant(const QJsonObject &val)
+
+    Constructs a new variant with a json object value, \a val.
+*/
+
+/*!
+    \since 5.0
+    \fn QVariant::QVariant(const QJsonArray &val)
+
+    Constructs a new variant with a json array value, \a val.
+*/
+
+/*!
+    \since 5.0
+    \fn QVariant::QVariant(const QJsonDocument &val)
+
+    Constructs a new variant with a json document value, \a val.
+*/
+
+/*!
   \fn QVariant::QVariant(const QByteArray &val)
 
     Constructs a new variant with a bytearray value, \a val.
@@ -1448,6 +1490,12 @@ QVariant::QVariant(const QLocale &l) { d.is_null = false; d.type = Locale; v_con
 QVariant::QVariant(const QRegExp &regExp) { d.is_null = false; d.type = RegExp; v_construct<QRegExp>(&d, regExp); }
 #ifndef QT_BOOTSTRAPPED
 QVariant::QVariant(const QRegularExpression &re) { d.is_null = false; d.type = QMetaType::QRegularExpression; v_construct<QRegularExpression>(&d, re); }
+QVariant::QVariant(const QUuid &uuid) { d.is_null = false; d.type = QMetaType::QUuid; v_construct<QUuid>(&d, uuid); }
+QVariant::QVariant(const QModelIndex &modelIndex) { d.is_null = false; d.type = QMetaType::QModelIndex; v_construct<QModelIndex>(&d, modelIndex); }
+QVariant::QVariant(const QJsonValue &jsonValue) { d.is_null = false; d.type = QMetaType::QJsonValue; v_construct<QJsonValue>(&d, jsonValue); }
+QVariant::QVariant(const QJsonObject &jsonObject) { d.is_null = false; d.type = QMetaType::QJsonObject; v_construct<QJsonObject>(&d, jsonObject); }
+QVariant::QVariant(const QJsonArray &jsonArray) { d.is_null = false; d.type = QMetaType::QJsonArray; v_construct<QJsonArray>(&d, jsonArray); }
+QVariant::QVariant(const QJsonDocument &jsonDocument) { d.is_null = false; d.type = QMetaType::QJsonDocument; v_construct<QJsonDocument>(&d, jsonDocument); }
 #endif // QT_BOOTSTRAPPED
 #endif // QT_NO_REGEXP
 
@@ -2127,6 +2175,84 @@ QRegularExpression QVariant::toRegularExpression() const
     return qVariantToHelper<QRegularExpression>(d, handlerManager);
 }
 #endif
+
+/*!
+    \since 5.0
+
+    Returns the variant as a QUuid if the variant has type() \l
+    QUuid; otherwise returns a default constructed QUuid.
+
+    \sa canConvert(), convert()
+*/
+QUuid QVariant::toUuid() const
+{
+    return qVariantToHelper<QUuid>(d, handlerManager);
+}
+
+/*!
+    \since 5.0
+
+    Returns the variant as a QModelIndex if the variant has type() \l
+    QModelIndex; otherwise returns a default constructed QModelIndex.
+
+    \sa canConvert(), convert()
+*/
+QModelIndex QVariant::toModelIndex() const
+{
+    return qVariantToHelper<QModelIndex>(d, handlerManager);
+}
+
+/*!
+    \since 5.0
+
+    Returns the variant as a QJsonValue if the variant has type() \l
+    QJsonValue; otherwise returns a default constructed QJsonValue.
+
+    \sa canConvert(), convert()
+*/
+QJsonValue QVariant::toJsonValue() const
+{
+    return qVariantToHelper<QJsonValue>(d, handlerManager);
+}
+
+/*!
+    \since 5.0
+
+    Returns the variant as a QJsonObject if the variant has type() \l
+    QJsonObject; otherwise returns a default constructed QJsonObject.
+
+    \sa canConvert(), convert()
+*/
+QJsonObject QVariant::toJsonObject() const
+{
+    return qVariantToHelper<QJsonObject>(d, handlerManager);
+}
+
+/*!
+    \since 5.0
+
+    Returns the variant as a QJsonArray if the variant has type() \l
+    QJsonArray; otherwise returns a default constructed QJsonArray.
+
+    \sa canConvert(), convert()
+*/
+QJsonArray QVariant::toJsonArray() const
+{
+    return qVariantToHelper<QJsonArray>(d, handlerManager);
+}
+
+/*!
+    \since 5.0
+
+    Returns the variant as a QJsonDocument if the variant has type() \l
+    QJsonDocument; otherwise returns a default constructed QJsonDocument.
+
+    \sa canConvert(), convert()
+*/
+QJsonDocument QVariant::toJsonDocument() const
+{
+    return qVariantToHelper<QJsonDocument>(d, handlerManager);
+}
 #endif
 
 /*!
diff --git a/src/corelib/kernel/qvariant.h b/src/corelib/kernel/qvariant.h
index c06a441468..8d342cb122 100644
--- a/src/corelib/kernel/qvariant.h
+++ b/src/corelib/kernel/qvariant.h
@@ -247,6 +247,12 @@ class Q_CORE_EXPORT QVariant
 #ifndef QT_BOOTSTRAPPED
     QVariant(const QUrl &url);
     QVariant(const QEasingCurve &easing);
+    QVariant(const QUuid &uuid);
+    QVariant(const QModelIndex &modelIndex);
+    QVariant(const QJsonValue &jsonValue);
+    QVariant(const QJsonObject &jsonObject);
+    QVariant(const QJsonArray &jsonArray);
+    QVariant(const QJsonDocument &jsonDocument);
 #endif
 
     QVariant& operator=(const QVariant &other);
@@ -314,6 +320,12 @@ class Q_CORE_EXPORT QVariant
 #ifndef QT_BOOTSTRAPPED
     QUrl toUrl() const;
     QEasingCurve toEasingCurve() const;
+    QUuid toUuid() const;
+    QModelIndex toModelIndex() const;
+    QJsonValue toJsonValue() const;
+    QJsonObject toJsonObject() const;
+    QJsonArray toJsonArray() const;
+    QJsonDocument toJsonDocument() const;
 #endif
 
 #ifndef QT_NO_DATASTREAM
diff --git a/src/gui/painting/qpolygon.cpp b/src/gui/painting/qpolygon.cpp
index d3d90ff6d2..06fec9a849 100644
--- a/src/gui/painting/qpolygon.cpp
+++ b/src/gui/painting/qpolygon.cpp
@@ -990,4 +990,9 @@ QPolygonF QPolygonF::subtracted(const QPolygonF &r) const
     return subject.subtracted(clip).toFillPolygon();
 }
 
+QPolygonF::operator QVariant() const
+{
+    return QVariant(QMetaType::QPolygonF, this);
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/painting/qpolygon.h b/src/gui/painting/qpolygon.h
index 726ed434ed..df94a2570e 100644
--- a/src/gui/painting/qpolygon.h
+++ b/src/gui/painting/qpolygon.h
@@ -142,6 +142,8 @@ public:
     /*implicit*/ QPolygonF(const QPolygon &a);
     inline void swap(QPolygonF &other) { QVector<QPointF>::swap(other); } // prevent QVector<QPointF><->QPolygonF swaps
 
+    operator QVariant() const;
+
     inline void translate(qreal dx, qreal dy);
     void translate(const QPointF &offset);
 
diff --git a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
index b6382d3896..7fc092b44d 100644
--- a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
+++ b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
@@ -234,6 +234,8 @@ private slots:
     void loadQt5Stream();
     void saveQt5Stream_data();
     void saveQt5Stream();
+
+    void implicitConstruction();
 private:
     void dataStream_data(QDataStream::Version version);
     void loadQVariantFromDataStream(QDataStream::Version version);
@@ -3254,5 +3256,53 @@ void tst_QVariant::debugStreamType()
     QVERIFY(msgHandler.testPassed());
 }
 
+void tst_QVariant::implicitConstruction()
+{
+    // This is a compile-time test
+    QVariant v;
+
+#define FOR_EACH_CORE_CLASS(F) \
+    F(Char) \
+    F(String) \
+    F(StringList) \
+    F(ByteArray) \
+    F(BitArray) \
+    F(Date) \
+    F(Time) \
+    F(DateTime) \
+    F(Url) \
+    F(Locale) \
+    F(Rect) \
+    F(RectF) \
+    F(Size) \
+    F(SizeF) \
+    F(Line) \
+    F(LineF) \
+    F(Point) \
+    F(PointF) \
+    F(RegExp) \
+    F(EasingCurve) \
+    F(Uuid) \
+    F(ModelIndex) \
+    F(RegularExpression) \
+    F(JsonValue) \
+    F(JsonObject) \
+    F(JsonArray) \
+    F(JsonDocument) \
+
+#define CONSTRUCT(TYPE) \
+    { \
+        Q##TYPE t; \
+        v = t; \
+        t = v.to##TYPE(); \
+        QVERIFY(true); \
+    }
+
+    FOR_EACH_CORE_CLASS(CONSTRUCT)
+
+#undef CONSTRUCT
+#undef FOR_EACH_CORE_CLASS
+}
+
 QTEST_MAIN(tst_QVariant)
 #include "tst_qvariant.moc"
diff --git a/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp b/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp
index 301d8891bb..5a8ff7b760 100644
--- a/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp
+++ b/tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp
@@ -59,6 +59,8 @@
 #include <qvector3d.h>
 #include <qvector4d.h>
 #include <qquaternion.h>
+#include <qtextdocument.h>
+#include <qtextformat.h>
 #include <qfont.h>
 
 #include "tst_qvariant_common.h"
@@ -118,6 +120,8 @@ private slots:
     void debugStream_data();
     void debugStream();
 
+    void implicitConstruction();
+
     void guiVariantAtExit();
 };
 
@@ -626,6 +630,49 @@ void tst_QGuiVariant::debugStream()
     QVERIFY(msgHandler.testPassed());
 }
 
+void tst_QGuiVariant::implicitConstruction()
+{
+    // This is a compile-time test
+    QVariant v;
+
+#define FOR_EACH_GUI_CLASS(F) \
+    F(Font) \
+    F(Pixmap) \
+    F(Brush) \
+    F(Color) \
+    F(Palette) \
+    F(Icon) \
+    F(Image) \
+    F(Polygon) \
+    F(Region) \
+    F(Bitmap) \
+    F(Cursor) \
+    F(KeySequence) \
+    F(Pen) \
+    F(TextLength) \
+    F(TextFormat) \
+    F(Matrix) \
+    F(Transform) \
+    F(Matrix4x4) \
+    F(Vector2D) \
+    F(Vector3D) \
+    F(Vector4D) \
+    F(Quaternion) \
+    F(PolygonF) \
+
+#define CONSTRUCT(TYPE) \
+    { \
+        Q##TYPE t; \
+        v = t; \
+        QVERIFY(true); \
+    }
+
+    FOR_EACH_GUI_CLASS(CONSTRUCT)
+
+#undef CONSTRUCT
+#undef FOR_EACH_GUI_CLASS
+}
+
 void tst_QGuiVariant::guiVariantAtExit()
 {
     // crash test, it should not crash at QGuiApplication exit
diff --git a/tests/auto/widgets/kernel/qwidgetsvariant/tst_qwidgetsvariant.cpp b/tests/auto/widgets/kernel/qwidgetsvariant/tst_qwidgetsvariant.cpp
index ccb9492a9a..90238b5d9b 100644
--- a/tests/auto/widgets/kernel/qwidgetsvariant/tst_qwidgetsvariant.cpp
+++ b/tests/auto/widgets/kernel/qwidgetsvariant/tst_qwidgetsvariant.cpp
@@ -69,6 +69,8 @@ private slots:
     void debugStream_data();
     void debugStream();
 
+    void implicitConstruction();
+
     void widgetsVariantAtExit();
 };
 
@@ -254,5 +256,27 @@ void tst_QWidgetsVariant::widgetsVariantAtExit()
     QVERIFY(true);
 }
 
+
+void tst_QWidgetsVariant::implicitConstruction()
+{
+    // This is a compile-time test
+    QVariant v;
+
+#define FOR_EACH_WIDGETS_CLASS(F) \
+    F(SizePolicy) \
+
+#define CONSTRUCT(TYPE) \
+    { \
+        Q##TYPE t; \
+        v = t; \
+        QVERIFY(true); \
+    }
+
+    FOR_EACH_WIDGETS_CLASS(CONSTRUCT)
+
+#undef CONSTRUCT
+#undef FOR_EACH_WIDGETS_CLASS
+}
+
 QTEST_MAIN(tst_QWidgetsVariant)
 #include "tst_qwidgetsvariant.moc"