20 files changed, 500 insertions, 116 deletions

diff --git a/src/dbus/doc/qtdbus.qdocconf b/src/dbus/doc/qtdbus.qdocconf
index 4ff7242b25..e08bbfd94e 100644
--- a/src/dbus/doc/qtdbus.qdocconf
+++ b/src/dbus/doc/qtdbus.qdocconf
@@ -1,4 +1,5 @@
 include($QT_INSTALL_DOCS/global/qt-module-defaults.qdocconf)
+include($QT_INSTALL_DOCS/config/exampleurl-qtbase.qdocconf)
 
 # Name of the project which must match the outputdir. Determines the .index file
 project = QtDBus
diff --git a/src/dbus/doc/snippets/cmake/examples.cmake b/src/dbus/doc/snippets/cmake/examples.cmake
new file mode 100644
index 0000000000..cb4f86844f
--- /dev/null
+++ b/src/dbus/doc/snippets/cmake/examples.cmake
@@ -0,0 +1,3 @@
+#! [qt5_add_dbus_adaptor]
+qt5_add_dbus_adaptor(GENERATED_SOURCES org.example.chat.xml chat.h ChatMainWindow)
+#! [qt5_add_dbus_adaptor]
diff --git a/src/dbus/doc/src/dontdocument.qdoc b/src/dbus/doc/src/dontdocument.qdoc
new file mode 100644
index 0000000000..bbb8acb53c
--- /dev/null
+++ b/src/dbus/doc/src/dontdocument.qdoc
@@ -0,0 +1,30 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+  \dontdocument (QTypeInfo QMetaTypeId QDBusAbstractInterfaceBase QDBusPendingReplyData QMetaTypeId2)
+*/
diff --git a/src/dbus/doc/src/qtdbus-cmake.qdoc b/src/dbus/doc/src/qtdbus-cmake.qdoc
new file mode 100644
index 0000000000..de127fa9f4
--- /dev/null
+++ b/src/dbus/doc/src/qtdbus-cmake.qdoc
@@ -0,0 +1,224 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+\page qtdbus-cmake-qt5-add-dbus-interface.html
+\ingroup cmake-commands-qtdbus
+
+\title qt5_add_dbus_interface
+
+\brief Generates C++ sources implementing an interface for a D-Bus interface
+description file.
+
+\section1 Synopsis
+
+\badcode
+qt5_add_dbus_interface(<VAR> dbus_spec basename)
+\endcode
+
+\section1 Description
+
+Generates C++ sources implementing an interface for a D-Bus interface description
+file defined in \c{dbus_spec}. The generated files are named after \c{basename}:
+\c{basename.h}, \c{basename.cpp}, \c{basename.moc}. The paths of the files
+are added to \c{<VAR>}.
+
+The function sets up a call to the \l{Qt D-Bus XML compiler (qdbusxml2cpp)}
+in interface (proxy) mode. By default, \c{qdbusxml2cpp} generates a C++
+class named after the interface name, with a namespaced alias:
+
+\table
+\header
+  \li D-Bus Interface Name
+  \li Class name
+  \li Namespaced name
+\row
+  \li \c{org.example.chat}
+  \li \c{OrgExampleChatInterface}
+  \li \c{org.example.chat}
+\endtable
+
+\section1 Options
+
+Options can be set using \c set_source_file_property on the \c dbus_spec:
+
+\table
+\header
+  \li Option
+  \li Value
+  \li Description
+\row
+  \li \c CLASSNAME
+  \li \c class_name
+  \li Override the default interface class name with \c{class_name}.
+\row
+  \li \c NO_NAMESPACE
+  \li boolean
+  \li Do not generate the namespaced name if set to \c{ON}.
+\row
+  \li \c INCLUDE
+  \li \c path
+  \li Add an \c{#include "path"} in the generated code.
+\endtable
+*/
+
+/*!
+\page qtdbus-cmake-qt5-add-dbus-interfaces.html
+\ingroup cmake-commands-qtdbus
+
+\title qt5_add_dbus_interfaces
+
+\brief Generates C++ sources implementing interfaces for D-Bus interface
+description files.
+
+\section1 Synopsis
+
+\badcode
+qt5_add_dbus_interfaces(<VAR> dbus_spec1 [dbus_spec2 ...])
+\endcode
+
+\section1 Description
+
+Generates C++ sources implementing D-Bus interfaces defined in \c{dbus_spec1},
+\c{dbus_spec2}, where each argument needs to be the path to a valid D-Bus
+interface description file. The paths of the generated files are added to
+\c{<VAR>}.
+
+For each argument, a call to the \l{Qt D-Bus XML compiler (qdbusxml2cpp)}
+in interface (proxy) mode is set up.
+
+The generated C++ source files are named after the XML file: For the file
+\c{org.example.chat.xml} the generated header will be named
+\c{orgexamplechatinterface.h}.
+
+\section1 Options
+
+Options can be set using \c set_source_file_property on each of the file
+arguments:
+
+\table
+\header
+  \li Option
+  \li Value
+  \li Description
+\row
+  \li \c CLASSNAME
+  \li \c class_name
+  \li Override the default interface class name with \c{class_name}.
+\row
+  \li \c NO_NAMESPACE
+  \li boolean
+  \li Do not generate the namespaced name if set to \c{ON}.
+\row
+  \li \c INCLUDE
+  \li \c path
+  \li Add an \c{#include "path"} in the generated code.
+\endtable
+*/
+
+/*!
+\page qtdbus-cmake-qt5-generate-dbus-interface.html
+\ingroup cmake-commands-qtdbus
+
+\title qt5_generate_dbus_interface
+
+\brief Generates a D-Bus interface from a header file.
+
+\section1 Synopsis
+
+\badcode
+qt5_generate_dbus_interface(header
+    [customName]
+    [OPTIONS options]
+)
+\endcode
+
+\section1 Description
+
+Parses the C++ source or header file containing a QObject-derived class
+declaration and generates a file containing the D-BUS Introspection XML.
+
+By default, the generated XML file is stored in the current binary directory,
+and has the same base name as the header. You can specify a different name or
+path by adding \c{customName} as an optional second argument.
+
+\section1 Options
+
+The function sets up a call to the \c{qdbuscpp2xml} command line tool. Further
+arguments to the tool can be set after \c{OPTIONS}.
+*/
+
+/*!
+\page qtdbus-cmake-qt5-add-dbus-adaptor.html
+\ingroup cmake-commands-qtdbus
+
+\title qt5_add_dbus_adaptor
+
+\brief Generates an adaptor class for a D-Bus interface.
+
+\section1 Synopsis
+
+\badcode
+qt5_add_dbus_adaptor(<VAR> dbus_spec header parent_class
+                     [basename]
+                     [classname])
+\endcode
+
+\section1 Description
+
+Generates a C++ header file implementing an adaptor for a D-Bus interface
+description file defined in \c{dbus_spec}. The path of the generated file is
+added to \c{<VAR>}. The generated adaptor class takes a pointer to
+\c{parent_class} as QObject parent. \c{parent_class} should be declared in
+\c{header}, which is included in the generated code as \c{#include "header"}.
+
+The function sets up a call to the \l{Qt D-Bus XML compiler (qdbusxml2cpp)}
+in adaptor mode. The default file and class name are generated from the last
+segment in the \c{dbus_spec} base name:
+
+\table
+\header
+  \li XML file
+  \li Header file
+  \li Class name
+\row
+  \li \c{org.example.chat}
+  \li \c{chatadaptor.h}
+  \li \c{ChatAdaptor}
+\endtable
+
+
+You can change the name of the header file to be generated by passing
+\c{basename} as the fifth argument. The \c{.h} suffix is always added.
+
+You can change the default class name by passing \c{classname} as the sixth
+argument.
+
+\section1 Examples
+
+\snippet cmake/examples.cmake qt5_add_dbus_adaptor
+*/
diff --git a/src/dbus/qdbusabstractinterface.cpp b/src/dbus/qdbusabstractinterface.cpp
index 220223d74d..87de784fc0 100644
--- a/src/dbus/qdbusabstractinterface.cpp
+++ b/src/dbus/qdbusabstractinterface.cpp
@@ -164,7 +164,7 @@ bool QDBusAbstractInterfacePrivate::property(const QMetaProperty &mp, void *retu
                      "used to read property %s.%s",
                      mp.typeName(), qPrintable(interface), mp.name());
             lastError = QDBusError(QDBusError::Failed,
-                                   QString::fromLatin1("Unregistered type %1 cannot be handled")
+                                   QLatin1String("Unregistered type %1 cannot be handled")
                                    .arg(QLatin1String(mp.typeName())));
             return false;
         }
@@ -220,15 +220,15 @@ bool QDBusAbstractInterfacePrivate::property(const QMetaProperty &mp, void *retu
     }
 
     // there was an error...
-    QString errmsg = QLatin1String("Unexpected `%1' (%2) when retrieving property `%3.%4' "
-                                   "(expected type `%5' (%6))");
+    const auto errmsg = QLatin1String("Unexpected `%1' (%2) when retrieving property `%3.%4' "
+                                      "(expected type `%5' (%6))");
     lastError = QDBusError(QDBusError::InvalidSignature,
-                           errmsg.arg(QString::fromLatin1(foundType),
-                                      QString::fromLatin1(foundSignature),
+                           errmsg.arg(QLatin1String(foundType),
+                                      QLatin1String(foundSignature),
                                       interface,
-                                      QString::fromUtf8(mp.name()),
-                                      QString::fromLatin1(mp.typeName()),
-                                      QString::fromLatin1(expectedSignature)));
+                                      QLatin1String(mp.name()),
+                                      QLatin1String(mp.typeName()),
+                                      QLatin1String(expectedSignature)));
     return false;
 }
 
@@ -691,18 +691,20 @@ void QDBusAbstractInterface::internalPropSet(const char *propname, const QVarian
 }
 
 /*!
-    Calls the method \a method on this interface and passes the parameters to this function to the
-    method.
+    \fn QDBusAbstractInterface::call(const QString &message)
+    \internal
+*/
+
+/*!
+    \fn QDBusAbstractInterface::call(const QString &message, Args&&...args)
+
+    Calls the method \a method on this interface and passes \a args to the method.
+    All \a args must be convertible to QVariant.
 
     The parameters to \c call are passed on to the remote function via D-Bus as input
     arguments. Output arguments are returned in the QDBusMessage reply. If the reply is an error
     reply, lastError() will also be set to the contents of the error message.
 
-    This function can be used with up to 8 parameters, passed in arguments \a arg1, \a arg2,
-    \a arg3, \a arg4, \a arg5, \a arg6, \a arg7 and \a arg8. If you need more than 8
-    parameters or if you have a variable number of parameters to be passed, use
-    callWithArgumentList().
-
     It can be used the following way:
 
     \snippet code/src_qdbus_qdbusabstractinterface.cpp 0
@@ -710,6 +712,19 @@ void QDBusAbstractInterface::internalPropSet(const char *propname, const QVarian
     This example illustrates function calling with 0, 1 and 2 parameters and illustrates different
     parameter types passed in each (the first call to \c "ProcessWorkUnicode" will contain one
     Unicode string, the second call to \c "ProcessWork" will contain one string and one byte array).
+
+    \note Before Qt 5.14, this function accepted a maximum of just eight (8) arguments.
+
+    \sa callWithArgumentList()
+*/
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+/*!
+    \internal
+
+    This function exists for binary compatibility with Qt versions < 5.14.
+    Programs recompiled against Qt 5.14 will use the variadic template function
+    instead.
 */
 QDBusMessage QDBusAbstractInterface::call(const QString &method, const QVariant &arg1,
                                           const QVariant &arg2,
@@ -722,27 +737,44 @@ QDBusMessage QDBusAbstractInterface::call(const QString &method, const QVariant
 {
     return call(QDBus::AutoDetect, method, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
 }
+#endif
+
+/*!
+    \fn QDBusAbstractInterface::call(QDBus::CallMode mode, const QString &message)
+    \internal
+*/
 
 /*!
+    \fn QDBusAbstractInterface::call(QDBus::CallMode mode, const QString &message, Args&&...args)
+
     \overload
 
-    Calls the method \a method on this interface and passes the
-    parameters to this function to the method. If \a mode is \c
-    NoWaitForReply, then this function will return immediately after
+    Calls the method \a method on this interface and passes \a args to the method.
+    All \a args must be convertible to QVariant.
+
+    If \a mode is \c NoWaitForReply, then this function will return immediately after
     placing the call, without waiting for a reply from the remote
     method. Otherwise, \a mode indicates whether this function should
     activate the Qt Event Loop while waiting for the reply to arrive.
 
-    This function can be used with up to 8 parameters, passed in arguments \a arg1, \a arg2,
-    \a arg3, \a arg4, \a arg5, \a arg6, \a arg7 and \a arg8. If you need more than 8
-    parameters or if you have a variable number of parameters to be passed, use
-    callWithArgumentList().
-
     If this function reenters the Qt event loop in order to wait for the
     reply, it will exclude user input. During the wait, it may deliver
     signals and other method calls to your application. Therefore, it
     must be prepared to handle a reentrancy whenever a call is placed
     with call().
+
+    \note Before Qt 5.14, this function accepted a maximum of just eight (8) arguments.
+
+    \sa callWithArgumentList()
+*/
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+/*!
+    \internal
+
+    This function exists for binary compatibility with Qt versions < 5.14.
+    Programs recompiled against Qt 5.14 will use the variadic template function
+    instead.
 */
 QDBusMessage QDBusAbstractInterface::call(QDBus::CallMode mode, const QString &method,
                                           const QVariant &arg1,
@@ -787,22 +819,23 @@ QDBusMessage QDBusAbstractInterface::call(QDBus::CallMode mode, const QString &m
 
     return callWithArgumentList(mode, method, argList);
 }
+#endif // Qt 5
 
+/*!
+    \fn QDBusAbstractInterface::asyncCall(const QString &message)
+    \internal
+*/
 
 /*!
-    \since 4.5
-    Calls the method \a method on this interface and passes the parameters to this function to the
-    method.
+    \fn QDBusAbstractInterface::asyncCall(const QString &message, Args&&...args)
+
+    Calls the method \a method on this interface and passes \a args to the method.
+    All \a args must be convertible to QVariant.
 
     The parameters to \c call are passed on to the remote function via D-Bus as input
     arguments. The returned QDBusPendingCall object can be used to find out information about
     the reply.
 
-    This function can be used with up to 8 parameters, passed in arguments \a arg1, \a arg2,
-    \a arg3, \a arg4, \a arg5, \a arg6, \a arg7 and \a arg8. If you need more than 8
-    parameters or if you have a variable number of parameters to be passed, use
-    asyncCallWithArgumentList().
-
     It can be used the following way:
 
     \snippet code/src_qdbus_qdbusabstractinterface.cpp 1
@@ -810,6 +843,19 @@ QDBusMessage QDBusAbstractInterface::call(QDBus::CallMode mode, const QString &m
     This example illustrates function calling with 0, 1 and 2 parameters and illustrates different
     parameter types passed in each (the first call to \c "ProcessWorkUnicode" will contain one
     Unicode string, the second call to \c "ProcessWork" will contain one string and one byte array).
+
+    \note Before Qt 5.14, this function accepted a maximum of just eight (8) arguments.
+
+    \sa asyncCallWithArgumentList()
+*/
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+/*!
+    \internal
+
+    This function exists for binary compatibility with Qt versions < 5.14.
+    Programs recompiled against Qt 5.14 will use the variadic template function
+    instead.
 */
 QDBusPendingCall QDBusAbstractInterface::asyncCall(const QString &method, const QVariant &arg1,
                                                    const QVariant &arg2,
@@ -853,6 +899,7 @@ QDBusPendingCall QDBusAbstractInterface::asyncCall(const QString &method, const
 
     return asyncCallWithArgumentList(method, argList);
 }
+#endif // Qt 5
 
 /*!
     \internal
@@ -865,6 +912,24 @@ QDBusMessage QDBusAbstractInterface::internalConstCall(QDBus::CallMode mode,
     return const_cast<QDBusAbstractInterface*>(this)->callWithArgumentList(mode, method, args);
 }
 
+QDBusMessage QDBusAbstractInterface::doCall(QDBus::CallMode mode, const QString &method, const QVariant *args, size_t numArgs)
+{
+    QList<QVariant> list;
+    list.reserve(int(numArgs));
+    for (size_t i = 0; i < numArgs; ++i)
+        list.append(args[i]);
+    return callWithArgumentList(mode, method, list);
+}
+
+QDBusPendingCall QDBusAbstractInterface::doAsyncCall(const QString &method, const QVariant *args, size_t numArgs)
+{
+    QList<QVariant> list;
+    list.reserve(int(numArgs));
+    for (size_t i = 0; i < numArgs; ++i)
+        list.append(args[i]);
+    return asyncCallWithArgumentList(method, list);
+}
+
 QT_END_NAMESPACE
 
 #endif // QT_NO_DBUS
diff --git a/src/dbus/qdbusabstractinterface.h b/src/dbus/qdbusabstractinterface.h
index d6b0870787..4f4c7430a5 100644
--- a/src/dbus/qdbusabstractinterface.h
+++ b/src/dbus/qdbusabstractinterface.h
@@ -49,6 +49,7 @@
 #include <QtDBus/qdbusmessage.h>
 #include <QtDBus/qdbusextratypes.h>
 #include <QtDBus/qdbusconnection.h>
+#include <QtDBus/qdbuspendingcall.h>
 
 #ifdef interface
 #undef interface
@@ -98,26 +99,52 @@ public:
     void setTimeout(int timeout);
     int timeout() const;
 
+    QDBusMessage call(const QString &method)
+    {
+        return doCall(QDBus::AutoDetect, method, nullptr, 0);
+    }
+
+    template <typename...Args>
+    QDBusMessage call(const QString &method, Args &&...args)
+    {
+        const QVariant variants[] = { QVariant(std::forward<Args>(args))... };
+        return doCall(QDBus::AutoDetect, method, variants, sizeof...(args));
+    }
+
+    QDBusMessage call(QDBus::CallMode mode, const QString &method)
+    {
+        return doCall(mode, method, nullptr, 0);
+    }
+
+    template <typename...Args>
+    QDBusMessage call(QDBus::CallMode mode, const QString &method, Args &&...args)
+    {
+        const QVariant variants[] = { QVariant(std::forward<Args>(args))... };
+        return doCall(mode, method, variants, sizeof...(args));
+    }
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     QDBusMessage call(const QString &method,
-                      const QVariant &arg1 = QVariant(),
-                      const QVariant &arg2 = QVariant(),
-                      const QVariant &arg3 = QVariant(),
-                      const QVariant &arg4 = QVariant(),
-                      const QVariant &arg5 = QVariant(),
-                      const QVariant &arg6 = QVariant(),
-                      const QVariant &arg7 = QVariant(),
-                      const QVariant &arg8 = QVariant());
+                      const QVariant &arg1,
+                      const QVariant &arg2,
+                      const QVariant &arg3,
+                      const QVariant &arg4,
+                      const QVariant &arg5,
+                      const QVariant &arg6,
+                      const QVariant &arg7,
+                      const QVariant &arg8);
 
     QDBusMessage call(QDBus::CallMode mode,
                       const QString &method,
-                      const QVariant &arg1 = QVariant(),
-                      const QVariant &arg2 = QVariant(),
-                      const QVariant &arg3 = QVariant(),
-                      const QVariant &arg4 = QVariant(),
-                      const QVariant &arg5 = QVariant(),
-                      const QVariant &arg6 = QVariant(),
-                      const QVariant &arg7 = QVariant(),
-                      const QVariant &arg8 = QVariant());
+                      const QVariant &arg1,
+                      const QVariant &arg2,
+                      const QVariant &arg3,
+                      const QVariant &arg4,
+                      const QVariant &arg5,
+                      const QVariant &arg6,
+                      const QVariant &arg7,
+                      const QVariant &arg8);
+#endif // Qt 5
 
     QDBusMessage callWithArgumentList(QDBus::CallMode mode,
                                       const QString &method,
@@ -130,15 +157,30 @@ public:
                           const QList<QVariant> &args,
                           QObject *receiver, const char *member);
 
+    QDBusPendingCall asyncCall(const QString &method)
+    {
+        return doAsyncCall(method, nullptr, 0);
+    }
+
+    template <typename...Args>
+    QDBusPendingCall asyncCall(const QString &method, Args&&...args)
+    {
+        const QVariant variants[] = { QVariant(std::forward<Args>(args))... };
+        return doAsyncCall(method, variants, sizeof...(args));
+    }
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     QDBusPendingCall asyncCall(const QString &method,
-                               const QVariant &arg1 = QVariant(),
-                               const QVariant &arg2 = QVariant(),
-                               const QVariant &arg3 = QVariant(),
-                               const QVariant &arg4 = QVariant(),
-                               const QVariant &arg5 = QVariant(),
-                               const QVariant &arg6 = QVariant(),
-                               const QVariant &arg7 = QVariant(),
-                               const QVariant &arg8 = QVariant());
+                               const QVariant &arg1,
+                               const QVariant &arg2,
+                               const QVariant &arg3,
+                               const QVariant &arg4,
+                               const QVariant &arg5,
+                               const QVariant &arg6,
+                               const QVariant &arg7,
+                               const QVariant &arg8);
+#endif // Qt 5
+
     QDBusPendingCall asyncCallWithArgumentList(const QString &method,
                                                const QList<QVariant> &args);
 
@@ -156,6 +198,10 @@ protected:
                                    const QList<QVariant> &args = QList<QVariant>()) const;
 
 private:
+    QDBusMessage doCall(QDBus::CallMode mode, const QString &method, const QVariant *args, size_t numArgs);
+    QDBusPendingCall doAsyncCall(const QString &method, const QVariant *args, size_t numArgs);
+
+private:
     Q_DECLARE_PRIVATE(QDBusAbstractInterface)
     Q_PRIVATE_SLOT(d_func(), void _q_serviceOwnerChanged(QString,QString,QString))
 };
diff --git a/src/dbus/qdbusargument.cpp b/src/dbus/qdbusargument.cpp
index 2d1373006d..764bc24165 100644
--- a/src/dbus/qdbusargument.cpp
+++ b/src/dbus/qdbusargument.cpp
@@ -111,7 +111,7 @@ bool QDBusArgumentPrivate::checkWrite(QDBusArgumentPrivate *&d)
         if (!d->marshaller()->ok)
             return false;
 
-        if (d->message && d->ref.load() != 1) {
+        if (d->message && d->ref.loadRelaxed() != 1) {
             QDBusMarshaller *dd = new QDBusMarshaller(d->capabilities);
             dd->message = q_dbus_message_copy(d->message);
             q_dbus_message_iter_init_append(dd->message, &dd->iterator);
@@ -152,7 +152,7 @@ bool QDBusArgumentPrivate::checkReadAndDetach(QDBusArgumentPrivate *&d)
     if (!checkRead(d))
         return false;           //  don't bother
 
-    if (d->ref.load() == 1)
+    if (d->ref.loadRelaxed() == 1)
         return true;            // no need to detach
 
     QDBusDemarshaller *dd = new QDBusDemarshaller(d->capabilities);
diff --git a/src/dbus/qdbusconnectioninterface.cpp b/src/dbus/qdbusconnectioninterface.cpp
index ebb3803489..a2335a1795 100644
--- a/src/dbus/qdbusconnectioninterface.cpp
+++ b/src/dbus/qdbusconnectioninterface.cpp
@@ -199,6 +199,18 @@ QDBusReply<QStringList> QDBusConnectionInterface::registeredServiceNames() const
 }
 
 /*!
+  \property QDBusConnectionInterface::activatableServiceNames
+  \brief holds the activatable service names
+  \since 5.14
+
+  Lists all names that can be activated on the bus.
+*/
+QDBusReply<QStringList> QDBusConnectionInterface::activatableServiceNames() const
+{
+    return internalConstCall(QDBus::AutoDetect, QLatin1String("ListActivatableNames"));
+}
+
+/*!
     Returns \c true if the service name \a serviceName has is currently
     registered.
 */
diff --git a/src/dbus/qdbusconnectioninterface.h b/src/dbus/qdbusconnectioninterface.h
index c7b1573722..d19e116c53 100644
--- a/src/dbus/qdbusconnectioninterface.h
+++ b/src/dbus/qdbusconnectioninterface.h
@@ -68,6 +68,7 @@ class Q_DBUS_EXPORT QDBusConnectionInterface: public QDBusAbstractInterface
     ~QDBusConnectionInterface();
 
     Q_PROPERTY(QDBusReply<QStringList> registeredServiceNames READ registeredServiceNames)
+    Q_PROPERTY(QDBusReply<QStringList> activatableServiceNames READ activatableServiceNames)
 
 public:
     enum ServiceQueueOptions {
@@ -90,6 +91,7 @@ public:
 
 public Q_SLOTS:
     QDBusReply<QStringList> registeredServiceNames() const;
+    QDBusReply<QStringList> activatableServiceNames() const;
     QDBusReply<bool> isServiceRegistered(const QString &serviceName) const;
     QDBusReply<QString> serviceOwner(const QString &name) const;
     QDBusReply<bool> unregisterService(const QString &serviceName);
diff --git a/src/dbus/qdbusintegrator.cpp b/src/dbus/qdbusintegrator.cpp
index 640acc2425..9306498f89 100644
--- a/src/dbus/qdbusintegrator.cpp
+++ b/src/dbus/qdbusintegrator.cpp
@@ -340,8 +340,9 @@ static QByteArray buildMatchRule(const QString &service,
                                  const QString &objectPath, const QString &interface,
                                  const QString &member, const QDBusConnectionPrivate::ArgMatchRules &argMatch, const QString & /*signature*/)
 {
-    QString result = QLatin1String("type='signal',");
-    QString keyValue = QLatin1String("%1='%2',");
+    QString result;
+    result += QLatin1String("type='signal',");
+    const auto keyValue = QLatin1String("%1='%2',");
 
     if (!service.isEmpty())
         result += keyValue.arg(QLatin1String("sender"), service);
@@ -354,13 +355,13 @@ static QByteArray buildMatchRule(const QString &service,
 
     // add the argument string-matching now
     if (!argMatch.args.isEmpty()) {
-        keyValue = QLatin1String("arg%1='%2',");
+        const QString keyValue = QLatin1String("arg%1='%2',");
         for (int i = 0; i < argMatch.args.count(); ++i)
             if (!argMatch.args.at(i).isNull())
                 result += keyValue.arg(i).arg(argMatch.args.at(i));
     }
     if (!argMatch.arg0namespace.isEmpty()) {
-        result += QStringLiteral("arg0namespace='%1',").arg(argMatch.arg0namespace);
+        result += QLatin1String("arg0namespace='%1',").arg(argMatch.arg0namespace);
     }
 
     result.chop(1);             // remove ending comma
@@ -534,7 +535,7 @@ qDBusSignalFilter(DBusConnection *connection, DBusMessage *message, void *data)
 
 bool QDBusConnectionPrivate::handleMessage(const QDBusMessage &amsg)
 {
-    if (!ref.load())
+    if (!ref.loadRelaxed())
         return false;
 
     // local message are always delivered, regardless of filtering
@@ -1077,7 +1078,7 @@ QDBusConnectionPrivate::~QDBusConnectionPrivate()
     if (lastMode == ClientMode || lastMode == PeerMode) {
         // the bus service object holds a reference back to us;
         // we need to destroy it before we finish destroying ourselves
-        Q_ASSERT(ref.load() == 0);
+        Q_ASSERT(ref.loadRelaxed() == 0);
         QObject *obj = (QObject *)busService;
         if (obj) {
             disconnect(obj, nullptr, this, nullptr);
@@ -1369,19 +1370,19 @@ void QDBusConnectionPrivate::sendError(const QDBusMessage &msg, QDBusError::Erro
         if (msg.interface().isEmpty())
             interfaceMsg = QLatin1String("any interface");
         else
-            interfaceMsg = QString::fromLatin1("interface '%1'").arg(msg.interface());
+            interfaceMsg = QLatin1String("interface '%1'").arg(msg.interface());
 
         send(msg.createErrorReply(code,
-                                  QString::fromLatin1("No such method '%1' in %2 at object path '%3' "
-                                                      "(signature '%4')")
+                                  QLatin1String("No such method '%1' in %2 at object path '%3' "
+                                                "(signature '%4')")
                                   .arg(msg.member(), interfaceMsg, msg.path(), msg.signature())));
     } else if (code == QDBusError::UnknownInterface) {
         send(msg.createErrorReply(QDBusError::UnknownInterface,
-                                  QString::fromLatin1("No such interface '%1' at object path '%2'")
+                                  QLatin1String("No such interface '%1' at object path '%2'")
                                   .arg(msg.interface(), msg.path())));
     } else if (code == QDBusError::UnknownObject) {
         send(msg.createErrorReply(QDBusError::UnknownObject,
-                                  QString::fromLatin1("No such object path '%1'").arg(msg.path())));
+                                  QLatin1String("No such object path '%1'").arg(msg.path())));
     }
 }
 
@@ -1551,8 +1552,8 @@ void QDBusConnectionPrivate::handleObjectCall(const QDBusMessage &msg)
         objThread = result.obj->thread();
         if (!objThread) {
             send(msg.createErrorReply(QDBusError::InternalError,
-                                      QString::fromLatin1("Object '%1' (at path '%2')"
-                                                          " has no thread. Cannot deliver message.")
+                                      QLatin1String("Object '%1' (at path '%2')"
+                                                    " has no thread. Cannot deliver message.")
                                       .arg(result.obj->objectName(), msg.path())));
             return;
         }
@@ -2082,7 +2083,7 @@ QDBusMessage QDBusConnectionPrivate::sendWithReplyLocal(const QDBusMessage &mess
         if (interface.isEmpty())
             interface = QLatin1String("<no-interface>");
         return QDBusMessage::createError(QDBusError::InternalError,
-                                         QString::fromLatin1("Internal error trying to call %1.%2 at %3 (signature '%4'")
+                                         QLatin1String("Internal error trying to call %1.%2 at %3 (signature '%4'")
                                          .arg(interface, message.member(),
                                               message.path(), message.signature()));
     }
@@ -2126,11 +2127,11 @@ QDBusPendingCallPrivate *QDBusConnectionPrivate::sendWithReplyAsync(const QDBusM
 
     if ((receiver && returnMethod) || errorMethod) {
        // no one waiting, will delete pcall in processFinishedCall()
-       pcall->ref.store(1);
+       pcall->ref.storeRelaxed(1);
     } else {
        // set double ref to prevent race between processFinishedCall() and ref counting
        // by QDBusPendingCall::QExplicitlySharedDataPointer<QDBusPendingCallPrivate>
-       pcall->ref.store(2);
+       pcall->ref.storeRelaxed(2);
     }
 
     if (isLoopback) {
diff --git a/src/dbus/qdbusinternalfilters.cpp b/src/dbus/qdbusinternalfilters.cpp
index 0ef5061b5f..edee4fc1e5 100644
--- a/src/dbus/qdbusinternalfilters.cpp
+++ b/src/dbus/qdbusinternalfilters.cpp
@@ -203,7 +203,7 @@ QString qDBusIntrospectObject(const QDBusConnectionPrivate::ObjectTreeNode &node
 static inline QDBusMessage interfaceNotFoundError(const QDBusMessage &msg, const QString &interface_name)
 {
     return msg.createErrorReply(QDBusError::UnknownInterface,
-                                QString::fromLatin1("Interface %1 was not found in object %2")
+                                QLatin1String("Interface %1 was not found in object %2")
                                 .arg(interface_name, msg.path()));
 }
 
@@ -211,10 +211,10 @@ static inline QDBusMessage
 propertyNotFoundError(const QDBusMessage &msg, const QString &interface_name, const QByteArray &property_name)
 {
     return msg.createErrorReply(QDBusError::UnknownProperty,
-                                QString::fromLatin1("Property %1%2%3 was not found in object %4")
+                                QLatin1String("Property %1%2%3 was not found in object %4")
                                 .arg(interface_name,
-                                     QString::fromLatin1(interface_name.isEmpty() ? "" : "."),
-                                     QString::fromLatin1(property_name),
+                                     QLatin1String(interface_name.isEmpty() ? "" : "."),
+                                     QLatin1String(property_name),
                                      msg.path()));
 }
 
@@ -302,16 +302,16 @@ static QDBusMessage propertyWriteReply(const QDBusMessage &msg, const QString &i
         return propertyNotFoundError(msg, interface_name, property_name);
     case PropertyTypeMismatch:
         return msg.createErrorReply(QDBusError::InvalidArgs,
-                                    QString::fromLatin1("Invalid arguments for writing to property %1%2%3")
+                                    QLatin1String("Invalid arguments for writing to property %1%2%3")
                                     .arg(interface_name,
-                                         QString::fromLatin1(interface_name.isEmpty() ? "" : "."),
-                                         QString::fromLatin1(property_name)));
+                                         QLatin1String(interface_name.isEmpty() ? "" : "."),
+                                         QLatin1String(property_name)));
     case PropertyReadOnly:
         return msg.createErrorReply(QDBusError::PropertyReadOnly,
-                                    QString::fromLatin1("Property %1%2%3 is read-only")
+                                    QLatin1String("Property %1%2%3 is read-only")
                                     .arg(interface_name,
-                                         QString::fromLatin1(interface_name.isEmpty() ? "" : "."),
-                                         QString::fromLatin1(property_name)));
+                                         QLatin1String(interface_name.isEmpty() ? "" : "."),
+                                         QLatin1String(property_name)));
     case PropertyWriteFailed:
         return msg.createErrorReply(QDBusError::InternalError,
                                     QString::fromLatin1("Internal error"));
diff --git a/src/dbus/qdbusmarshaller.cpp b/src/dbus/qdbusmarshaller.cpp
index 4ea6cefff6..8e0b3e4598 100644
--- a/src/dbus/qdbusmarshaller.cpp
+++ b/src/dbus/qdbusmarshaller.cpp
@@ -211,7 +211,7 @@ inline bool QDBusMarshaller::append(const QDBusVariant &arg)
         qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                  "Use qDBusRegisterMetaType to register it",
                  QMetaType::typeName(id), id);
-        error(QString::fromLatin1("Unregistered type %1 passed in arguments")
+        error(QLatin1String("Unregistered type %1 passed in arguments")
               .arg(QLatin1String(QMetaType::typeName(id))));
         return false;
     }
@@ -253,7 +253,7 @@ inline QDBusMarshaller *QDBusMarshaller::beginArray(int id)
         qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                  "Use qDBusRegisterMetaType to register it",
                  QMetaType::typeName(id), id);
-        error(QString::fromLatin1("Unregistered type %1 passed in arguments")
+        error(QLatin1String("Unregistered type %1 passed in arguments")
               .arg(QLatin1String(QMetaType::typeName(id))));
         return this;
     }
@@ -268,14 +268,14 @@ inline QDBusMarshaller *QDBusMarshaller::beginMap(int kid, int vid)
         qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                  "Use qDBusRegisterMetaType to register it",
                  QMetaType::typeName(kid), kid);
-        error(QString::fromLatin1("Unregistered type %1 passed in arguments")
+        error(QLatin1String("Unregistered type %1 passed in arguments")
               .arg(QLatin1String(QMetaType::typeName(kid))));
         return this;
     }
     if (ksignature[1] != 0 || !QDBusUtil::isValidBasicType(*ksignature)) {
         qWarning("QDBusMarshaller: type '%s' (%d) cannot be used as the key type in a D-BUS map.",
                  QMetaType::typeName(kid), kid);
-        error(QString::fromLatin1("Type %1 passed in arguments cannot be used as a key in a map")
+        error(QLatin1String("Type %1 passed in arguments cannot be used as a key in a map")
               .arg(QLatin1String(QMetaType::typeName(kid))));
         return this;
     }
@@ -286,7 +286,7 @@ inline QDBusMarshaller *QDBusMarshaller::beginMap(int kid, int vid)
         qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                  "Use qDBusRegisterMetaType to register it",
                  typeName, vid);
-        error(QString::fromLatin1("Unregistered type %1 passed in arguments")
+        error(QLatin1String("Unregistered type %1 passed in arguments")
               .arg(QLatin1String(typeName)));
         return this;
     }
@@ -417,7 +417,7 @@ bool QDBusMarshaller::appendVariantInternal(const QVariant &arg)
         qWarning("QDBusMarshaller: type `%s' (%d) is not registered with D-BUS. "
                  "Use qDBusRegisterMetaType to register it",
                  QMetaType::typeName(id), id);
-        error(QString::fromLatin1("Unregistered type %1 passed in arguments")
+        error(QLatin1String("Unregistered type %1 passed in arguments")
               .arg(QLatin1String(QMetaType::typeName(id))));
         return false;
     }
diff --git a/src/dbus/qdbusmetaobject.cpp b/src/dbus/qdbusmetaobject.cpp
index c4296f5c55..806cf7b415 100644
--- a/src/dbus/qdbusmetaobject.cpp
+++ b/src/dbus/qdbusmetaobject.cpp
@@ -649,7 +649,7 @@ QDBusMetaObject *QDBusMetaObject::createMetaObject(const QString &interface, con
 
     // mark as an error
     error = QDBusError(QDBusError::UnknownInterface,
-        QString::fromLatin1("Interface '%1' was not found")
+        QLatin1String("Interface '%1' was not found")
                        .arg(interface));
     return 0;
 }
diff --git a/src/dbus/qdbusmetatype.cpp b/src/dbus/qdbusmetatype.cpp
index 0729a3cbbb..58ce4f8930 100644
--- a/src/dbus/qdbusmetatype.cpp
+++ b/src/dbus/qdbusmetatype.cpp
@@ -93,7 +93,7 @@ void QDBusMetaTypeId::init()
 
     // reentrancy is not a problem since everything else is locked on their own
     // set the guard variable at the end
-    if (!initialized.load()) {
+    if (!initialized.loadRelaxed()) {
         // register our types with Qt Core (calling qMetaTypeId<T>() does this implicitly)
         (void)message();
         (void)argument();
@@ -145,7 +145,7 @@ void QDBusMetaTypeId::init()
         qDBusRegisterMetaType<QVector<QDBusUnixFileDescriptor> >();
 #endif
 
-        initialized.store(true);
+        initialized.storeRelaxed(true);
     }
 }
 
diff --git a/src/dbus/qdbuspendingcall.cpp b/src/dbus/qdbuspendingcall.cpp
index 4d0131afff..7c2238900c 100644
--- a/src/dbus/qdbuspendingcall.cpp
+++ b/src/dbus/qdbuspendingcall.cpp
@@ -221,8 +221,8 @@ void QDBusPendingCallPrivate::checkReceivedSignature()
 
     // can't use startsWith here because a null string doesn't start or end with an empty string
     if (replyMessage.signature().indexOf(expectedReplySignature) != 0) {
-        QString errorMsg = QLatin1String("Unexpected reply signature: got \"%1\", "
-                                         "expected \"%2\"");
+        const auto errorMsg = QLatin1String("Unexpected reply signature: got \"%1\", "
+                                            "expected \"%2\"");
         replyMessage = QDBusMessage::createError(
             QDBusError::InvalidSignature,
             errorMsg.arg(replyMessage.signature(), expectedReplySignature));
@@ -473,7 +473,7 @@ QDBusPendingCall QDBusPendingCall::fromCompletedCall(const QDBusMessage &msg)
         msg.type() == QDBusMessage::ReplyMessage) {
         d = new QDBusPendingCallPrivate(QDBusMessage(), 0);
         d->replyMessage = msg;
-        d->ref.store(1);
+        d->ref.storeRelaxed(1);
     }
 
     return QDBusPendingCall(d);
diff --git a/src/dbus/qdbusreply.cpp b/src/dbus/qdbusreply.cpp
index 6abfaf174c..cf1a70508c 100644
--- a/src/dbus/qdbusreply.cpp
+++ b/src/dbus/qdbusreply.cpp
@@ -228,14 +228,14 @@ void qDBusReplyFill(const QDBusMessage &reply, QDBusError &error, QVariant &data
         receivedSignature = "<empty signature>";
     QString errorMsg;
     if (receivedType) {
-        errorMsg = QString::fromLatin1("Unexpected reply signature: got \"%1\" (%4), "
+        errorMsg = QLatin1String("Unexpected reply signature: got \"%1\" (%4), "
                                          "expected \"%2\" (%3)")
                    .arg(QLatin1String(receivedSignature),
                         QLatin1String(expectedSignature),
                         QLatin1String(data.typeName()),
                         QLatin1String(receivedType));
     } else {
-        errorMsg = QString::fromLatin1("Unexpected reply signature: got \"%1\", "
+        errorMsg = QLatin1String("Unexpected reply signature: got \"%1\", "
                                          "expected \"%2\" (%3)")
                    .arg(QLatin1String(receivedSignature),
                         QLatin1String(expectedSignature),
diff --git a/src/dbus/qdbusserver.cpp b/src/dbus/qdbusserver.cpp
index a2dfb86164..2899fb7bea 100644
--- a/src/dbus/qdbusserver.cpp
+++ b/src/dbus/qdbusserver.cpp
@@ -117,7 +117,7 @@ QDBusServer::~QDBusServer()
         d->serverConnectionNames.clear();
     }
     d->serverObject = nullptr;
-    d->ref.store(0);
+    d->ref.storeRelaxed(0);
     d->deleteLater();
 }
 
diff --git a/src/dbus/qdbusunixfiledescriptor.cpp b/src/dbus/qdbusunixfiledescriptor.cpp
index 459cfc6c66..73d1db2680 100644
--- a/src/dbus/qdbusunixfiledescriptor.cpp
+++ b/src/dbus/qdbusunixfiledescriptor.cpp
@@ -208,7 +208,7 @@ QDBusUnixFileDescriptor::~QDBusUnixFileDescriptor()
 */
 bool QDBusUnixFileDescriptor::isValid() const
 {
-    return d ? d->fd.load() != -1 : false;
+    return d ? d->fd.loadRelaxed() != -1 : false;
 }
 
 /*!
@@ -226,7 +226,7 @@ bool QDBusUnixFileDescriptor::isValid() const
 */
 int QDBusUnixFileDescriptor::fileDescriptor() const
 {
-    return d ? d->fd.load() : -1;
+    return d ? d->fd.loadRelaxed() : -1;
 }
 
 // actual implementation
@@ -283,12 +283,12 @@ void QDBusUnixFileDescriptor::giveFileDescriptor(int fileDescriptor)
     else
         d = new QDBusUnixFileDescriptorPrivate;
 
-    const int fdl = d->fd.load();
+    const int fdl = d->fd.loadRelaxed();
     if (fdl != -1)
         qt_safe_close(fdl);
 
     if (fileDescriptor != -1)
-        d->fd.store(fileDescriptor);
+        d->fd.storeRelaxed(fileDescriptor);
 }
 
 /*!
@@ -309,7 +309,7 @@ int QDBusUnixFileDescriptor::takeFileDescriptor()
 
 QDBusUnixFileDescriptorPrivate::~QDBusUnixFileDescriptorPrivate()
 {
-    const int fdl = fd.load();
+    const int fdl = fd.loadRelaxed();
     if (fdl != -1)
         qt_safe_close(fdl);
 }
diff --git a/src/dbus/qdbusutil_p.h b/src/dbus/qdbusutil_p.h
index 5a4b461194..0814cc8050 100644
--- a/src/dbus/qdbusutil_p.h
+++ b/src/dbus/qdbusutil_p.h
@@ -106,7 +106,7 @@ namespace Q_DBUS_NO_EXPORT QDBusUtil
             return false;
         }
         if (isValidInterfaceName(name)) return true;
-        *error = QDBusError(QDBusError::InvalidInterface, QString::fromLatin1("Invalid interface class: %1").arg(name));
+        *error = QDBusError(QDBusError::InvalidInterface, QLatin1String("Invalid interface class: %1").arg(name));
         return false;
     }
 
@@ -118,7 +118,7 @@ namespace Q_DBUS_NO_EXPORT QDBusUtil
             return false;
         }
         if (isValidBusName(name)) return true;
-        *error = QDBusError(QDBusError::InvalidService, QString::fromLatin1("Invalid service name: %1").arg(name));
+        *error = QDBusError(QDBusError::InvalidService, QLatin1String("Invalid service name: %1").arg(name));
         return false;
     }
 
@@ -130,7 +130,7 @@ namespace Q_DBUS_NO_EXPORT QDBusUtil
             return false;
         }
         if (isValidObjectPath(path)) return true;
-        *error = QDBusError(QDBusError::InvalidObjectPath, QString::fromLatin1("Invalid object path: %1").arg(path));
+        *error = QDBusError(QDBusError::InvalidObjectPath, QLatin1String("Invalid object path: %1").arg(path));
         return false;
     }
 
@@ -143,8 +143,8 @@ namespace Q_DBUS_NO_EXPORT QDBusUtil
             return false;
         }
         if (isValidMemberName(name)) return true;
-        *error = QDBusError(QDBusError::InvalidMember, QString::fromLatin1("Invalid %1 name: %2")
-                            .arg(QString::fromLatin1(nameType), name));
+        *error = QDBusError(QDBusError::InvalidMember, QLatin1String("Invalid %1 name: %2")
+                            .arg(QLatin1String(nameType), name));
         return false;
     }
 
@@ -156,7 +156,7 @@ namespace Q_DBUS_NO_EXPORT QDBusUtil
             return false;
         }
         if (isValidErrorName(name)) return true;
-        *error = QDBusError(QDBusError::InvalidInterface, QString::fromLatin1("Invalid error name: %1").arg(name));
+        *error = QDBusError(QDBusError::InvalidInterface, QLatin1String("Invalid error name: %1").arg(name));
         return false;
     }
 
diff --git a/src/dbus/qdbusxmlgenerator.cpp b/src/dbus/qdbusxmlgenerator.cpp
index e3c503aa0f..c6b3b90508 100644
--- a/src/dbus/qdbusxmlgenerator.cpp
+++ b/src/dbus/qdbusxmlgenerator.cpp
@@ -108,14 +108,14 @@ static QString generateInterfaceXml(const QMetaObject *mo, int flags, int method
             if (!signature)
                 continue;
 
-            retval += QString::fromLatin1("    <property name=\"%1\" type=\"%2\" access=\"%3\"")
+            retval += QLatin1String("    <property name=\"%1\" type=\"%2\" access=\"%3\"")
                       .arg(QLatin1String(mp.name()),
                            QLatin1String(signature),
                            accessAsString(mp.isReadable(), mp.isWritable()));
 
             if (QDBusMetaType::signatureToType(signature) == QVariant::Invalid) {
                 const char *typeName = QMetaType::typeName(typeId);
-                retval += QString::fromLatin1(">\n      <annotation name=\"org.qtproject.QtDBus.QtTypeName\" value=\"%3\"/>\n    </property>\n")
+                retval += QLatin1String(">\n      <annotation name=\"org.qtproject.QtDBus.QtTypeName\" value=\"%3\"/>\n    </property>\n")
                           .arg(typeNameToXml(typeName));
             } else {
                 retval += QLatin1String("/>\n");
@@ -157,12 +157,12 @@ static QString generateInterfaceXml(const QMetaObject *mo, int flags, int method
         if (typeId != QMetaType::UnknownType && typeId != QMetaType::Void) {
             const char *typeName = QDBusMetaType::typeToSignature(typeId);
             if (typeName) {
-                xml += QString::fromLatin1("      <arg type=\"%1\" direction=\"out\"/>\n")
+                xml += QLatin1String("      <arg type=\"%1\" direction=\"out\"/>\n")
                        .arg(typeNameToXml(typeName));
 
                 // do we need to describe this argument?
                 if (QDBusMetaType::signatureToType(typeName) == QVariant::Invalid)
-                    xml += QString::fromLatin1("      <annotation name=\"org.qtproject.QtDBus.QtTypeName.Out0\" value=\"%1\"/>\n")
+                    xml += QLatin1String("      <annotation name=\"org.qtproject.QtDBus.QtTypeName.Out0\" value=\"%1\"/>\n")
                         .arg(typeNameToXml(QMetaType::typeName(typeId)));
             } else {
                 qWarning() << "Unsupported return type" << typeId << QMetaType::typeName(typeId) << "in method" << mm.name();
@@ -199,7 +199,7 @@ static QString generateInterfaceXml(const QMetaObject *mo, int flags, int method
 
             QString name;
             if (!names.at(j - 1).isEmpty())
-                name = QString::fromLatin1("name=\"%1\" ").arg(QLatin1String(names.at(j - 1)));
+                name = QLatin1String("name=\"%1\" ").arg(QLatin1String(names.at(j - 1)));
 
             bool isOutput = isSignal || j > inputCount;
 
@@ -233,7 +233,7 @@ static QString generateInterfaceXml(const QMetaObject *mo, int flags, int method
                                  " value=\"true\"/>\n");
 
         retval += xml;
-        retval += QString::fromLatin1("    </%1>\n")
+        retval += QLatin1String("    </%1>\n")
                   .arg(isSignal ? QLatin1String("signal") : QLatin1String("method"));
     }
 
@@ -256,7 +256,7 @@ QString qDBusGenerateMetaObjectXml(QString interface, const QMetaObject *mo,
 
     if (xml.isEmpty())
         return QString();       // don't add an empty interface
-    return QString::fromLatin1("  <interface name=\"%1\">\n%2  </interface>\n")
+    return QLatin1String("  <interface name=\"%1\">\n%2  </interface>\n")
         .arg(interface, xml);
 }
 #if 0