Fix minor API problems

Add explicit where appropriate, and use more elegant constructs in
inline functions. Introduce removed_api.cpp for
QJSEngine::create(int, const void *).

Pick-to: 6.5
Change-Id: Ie54b0494fe3c5567f8a5ca361c3a583de3d97dd5
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/qml/CMakeLists.txt

@@ -128,6 +128,7 @@ qt_internal_add_qml_module(Qml
         common/qv4staticvalue_p.h
         common/qv4stringtoarrayindex_p.h
         common/qqmltranslation.cpp common/qqmltranslation_p.h
+        compat/removed_api.cpp
         compiler/qqmlirbuilder.cpp compiler/qqmlirbuilder_p.h
         compiler/qv4bytecodegenerator.cpp compiler/qv4bytecodegenerator_p.h
         compiler/qv4bytecodehandler.cpp compiler/qv4bytecodehandler_p.h
@@ -421,6 +422,8 @@ qt_internal_add_qml_module(Qml
     GENERATE_PRIVATE_CPP_EXPORTS
 )
 
+qt_update_ignore_pch_source(Qml "compat/removed_api.cpp")
+
 qt_internal_add_qml_module(QmlMeta
     URI "QtQml"
     VERSION "${PROJECT_VERSION}"

src/qml/compat/removed_api.cpp

@@ -0,0 +1,21 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#define QT_QML_BUILD_REMOVED_API
+
+#include "qtqmlglobal.h"
+
+QT_USE_NAMESPACE
+
+#if QT_QML_REMOVED_SINCE(6, 5)
+
+#include <QtQml/qjsengine.h>
+
+QJSValue QJSEngine::create(int typeId, const void *ptr)
+{
+    QMetaType type(typeId);
+    return create(type, ptr);
+}
+
+#endif
+

src/qml/jsapi/qjsengine.cpp

@@ -818,14 +818,6 @@ QJSValue QJSEngine::create(QMetaType type, const void *ptr)
     return QJSValuePrivate::fromReturnedValue(v->asReturnedValue());
 }
 
-#if QT_VERSION < QT_VERSION_CHECK(7,0,0)
-QJSValue QJSEngine::create(int typeId, const void *ptr)
-{
-    QMetaType type(typeId);
-    return create(type, ptr);
-}
-#endif
-
 bool QJSEngine::convertPrimitive(const QJSPrimitiveValue &value, QMetaType type, void *ptr)
 {
     switch (value.type()) {

src/qml/jsapi/qjsengine.h

@@ -76,9 +76,9 @@ public:
                 std::is_same<T, double>,
                 std::is_same<T, QString>>) {
             return QJSPrimitiveValue(value);
+        } else {
+            return createPrimitive(QMetaType::fromType<T>(), &value);
         }
-
-        return createPrimitive(QMetaType::fromType<T>(), &value);
     }
 
     template <typename T>
@@ -298,7 +298,7 @@ private:
     QJSPrimitiveValue createPrimitive(QMetaType type, const void *ptr);
     QJSManagedValue createManaged(QMetaType type, const void *ptr);
     QJSValue create(QMetaType type, const void *ptr);
-#if QT_VERSION < QT_VERSION_CHECK(7,0,0)
+#if QT_QML_REMOVED_SINCE(6, 5)
     QJSValue create(int id, const void *ptr); // only there for BC reasons
 #endif
 
@@ -341,8 +341,7 @@ Q_DECLARE_OPERATORS_FOR_FLAGS(QJSEngine::Extensions)
 template<typename T>
 T qjsvalue_cast(const QJSValue &value)
 {
-    T t;
-    if (QJSEngine::convertV2(value, QMetaType::fromType<T>(), &t))
+    if (T t; QJSEngine::convertV2(value, QMetaType::fromType<T>(), &t))
         return t;
     else if (value.isVariant())
         return qvariant_cast<T>(value.toVariant());
@@ -353,11 +352,8 @@ T qjsvalue_cast(const QJSValue &value)
 template<typename T>
 T qjsvalue_cast(const QJSManagedValue &value)
 {
-    {
-        T t;
-        if (QJSEngine::convertManaged(value, QMetaType::fromType<T>(), &t))
-            return t;
-    }
+    if (T t; QJSEngine::convertManaged(value, QMetaType::fromType<T>(), &t))
+        return t;
 
     return qvariant_cast<T>(value.toVariant());
 }
@@ -365,11 +361,8 @@ T qjsvalue_cast(const QJSManagedValue &value)
 template<typename T>
 T qjsvalue_cast(const QJSPrimitiveValue &value)
 {
-    {
-        T t;
-        if (QJSEngine::convertPrimitive(value, QMetaType::fromType<T>(), &t))
-            return t;
-    }
+    if (T t; QJSEngine::convertPrimitive(value, QMetaType::fromType<T>(), &t))
+        return t;
 
     return qvariant_cast<T>(value.toVariant());
 }

src/qml/qml/qqmlapplicationengine.h

@@ -19,7 +19,8 @@ class Q_QML_EXPORT QQmlApplicationEngine : public QQmlEngine
 public:
     QQmlApplicationEngine(QObject *parent = nullptr);
     QQmlApplicationEngine(const QUrl &url, QObject *parent = nullptr);
-    QQmlApplicationEngine(QAnyStringView uri, QAnyStringView typeName, QObject *parent = nullptr);
+    explicit QQmlApplicationEngine(QAnyStringView uri, QAnyStringView typeName,
+                                   QObject *parent = nullptr);
     QQmlApplicationEngine(const QString &filePath, QObject *parent = nullptr);
     ~QQmlApplicationEngine() override;
 

src/qml/qml/qqmlcomponent.h

@@ -53,8 +53,8 @@ public:
     QQmlComponent(QQmlEngine *, const QUrl &url, QObject *parent = nullptr);
     QQmlComponent(QQmlEngine *, const QUrl &url, CompilationMode mode, QObject *parent = nullptr);
 
-    QQmlComponent(QQmlEngine *engine, QAnyStringView uri, QAnyStringView typeName, QObject *parent = nullptr);
-    QQmlComponent(QQmlEngine *engine, QAnyStringView uri, QAnyStringView typeName, CompilationMode mode, QObject *parent = nullptr);
+    explicit QQmlComponent(QQmlEngine *engine, QAnyStringView uri, QAnyStringView typeName, QObject *parent = nullptr);
+    explicit QQmlComponent(QQmlEngine *engine, QAnyStringView uri, QAnyStringView typeName, CompilationMode mode, QObject *parent = nullptr);
 
     ~QQmlComponent() override;