1 files changed, 44 insertions, 0 deletions
diff --git a/examples/corelib/serialization/convert/converter.cpp b/examples/corelib/serialization/convert/converter.cpp
new file mode 100644
index 0000000000..a57f305971
--- /dev/null
+++ b/examples/corelib/serialization/convert/converter.cpp
@@ -0,0 +1,44 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "converter.h"
+
+//! [0]
+Converter::Converter()
+{
+    converters().append(this);
+}
+
+Converter::~Converter()
+{
+    converters().removeAll(this);
+}
+
+QList<const Converter *> &Converter::converters()
+{
+    Q_CONSTINIT static QList<const Converter *> store;
+    return store;
+}
+
+const QList<const Converter *> &Converter::allConverters()
+{
+    return converters();
+}
+//! [0]
+
+// Some virtual methods that Converter classes needn't override, when not relevant:
+Converter::Options Converter::outputOptions() const { return {}; }
+const char *Converter::optionsHelp() const { return nullptr; }
+bool Converter::probeFile(QIODevice *) const { return false; }
+
+// The virtual method they should override if they claim to support In:
+QVariant Converter::loadFile(QIODevice *, const Converter *&outputConverter) const
+{
+    Q_ASSERT(!directions().testFlag(Converter::Direction::In));
+    // For those that don't, this should never be called.
+    Q_UNIMPLEMENTED();
+    // But every implementation should at least do this:
+    if (!outputConverter)
+        outputConverter = this;
+    return QVariant();
+}