Serialization converter example: const-ify the Converter type

Its methods act on their parameters without changing the converter, so
can all be const. Its instances thus have no non-const members to
exercise, so can always be const.

Pick-to: 6.6 6.5
Task-number: QTBUG-111228
Change-Id: Ifcdb2f2159c2cfcd7998dd118aa327a32d299ccf
Reviewed-by: Dennis Oberst <dennis.oberst@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

1 files changed, 8 insertions, 7 deletions

diff --git a/examples/corelib/serialization/convert/xmlconverter.h b/examples/corelib/serialization/convert/xmlconverter.h
index 19bde6c7c6..51476e61e4 100644
--- a/examples/corelib/serialization/convert/xmlconverter.h
+++ b/examples/corelib/serialization/convert/xmlconverter.h
@@ -10,13 +10,14 @@ class XmlConverter : public Converter
 {
     // Converter interface
 public:
-    QString name() override;
-    Direction directions() override;
-    Options outputOptions() override;
-    const char *optionsHelp() override;
-    bool probeFile(QIODevice *f) override;
-    QVariant loadFile(QIODevice *f, Converter *&outputConverter) override;
-    void saveFile(QIODevice *f, const QVariant &contents, const QStringList &options) override;
+    QString name() const override;
+    Direction directions() const override;
+    Options outputOptions() const override;
+    const char *optionsHelp() const override;
+    bool probeFile(QIODevice *f) const override;
+    QVariant loadFile(QIODevice *f, const Converter *&outputConverter) const override;
+    void saveFile(QIODevice *f, const QVariant &contents,
+                  const QStringList &options) const override;
 };
 
 #endif // XMLCONVERTER_H