mimetypes: Declare some types as shared

It's private API, so we can.

As a consequence, had to add nothrow member-swap and, in
QMimeGlobPattern, remove the user-defined empty destructor
to un-inhibit the (nothrow) move special member functions.

Change-Id: If5bb72db3c823c7b0e372f9bec99c7242d11839b
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

src/corelib/mimetypes/qmimeglobpattern_p.h

@@ -88,7 +88,14 @@ public:
             m_pattern = m_pattern.toLower();
         }
     }
-    ~QMimeGlobPattern() {}
+
+    void swap(QMimeGlobPattern &other) Q_DECL_NOTHROW
+    {
+        qSwap(m_pattern,         other.m_pattern);
+        qSwap(m_mimeType,        other.m_mimeType);
+        qSwap(m_weight,          other.m_weight);
+        qSwap(m_caseSensitivity, other.m_caseSensitivity);
+    }
 
     bool matchFileName(const QString &filename) const;
 
@@ -103,6 +110,7 @@ private:
     int m_weight;
     Qt::CaseSensitivity m_caseSensitivity;
 };
+Q_DECLARE_SHARED(QMimeGlobPattern)
 
 class QMimeGlobPatternList : public QList<QMimeGlobPattern>
 {

src/corelib/mimetypes/qmimemagicrule_p.h

@@ -69,6 +69,19 @@ public:
     QMimeMagicRule(const QString &typeStr, const QByteArray &value, const QString &offsets,
                    const QByteArray &mask, QString *errorString);
 
+    void swap(QMimeMagicRule &other) Q_DECL_NOTHROW
+    {
+        qSwap(m_type,          other.m_type);
+        qSwap(m_value,         other.m_value);
+        qSwap(m_startPos,      other.m_startPos);
+        qSwap(m_endPos,        other.m_endPos);
+        qSwap(m_mask,          other.m_mask);
+        qSwap(m_pattern,       other.m_pattern);
+        qSwap(m_number,        other.m_number);
+        qSwap(m_numberMask,    other.m_numberMask);
+        qSwap(m_matchFunction, other.m_matchFunction);
+    }
+
     bool operator==(const QMimeMagicRule &other) const;
 
     Type type() const { return m_type; }
@@ -108,7 +121,7 @@ private:
     template <typename T>
     bool matchNumber(const QByteArray &data) const;
 };
-Q_DECLARE_TYPEINFO(QMimeMagicRule, Q_MOVABLE_TYPE);
+Q_DECLARE_SHARED(QMimeMagicRule)
 
 QT_END_NAMESPACE
 

src/corelib/mimetypes/qmimemagicrulematcher_p.h

@@ -66,6 +66,13 @@ class QMimeMagicRuleMatcher
 public:
     explicit QMimeMagicRuleMatcher(const QString &mime, unsigned priority = 65535);
 
+    void swap(QMimeMagicRuleMatcher &other) Q_DECL_NOTHROW
+    {
+        qSwap(m_list,     other.m_list);
+        qSwap(m_priority, other.m_priority);
+        qSwap(m_mimetype, other.m_mimetype);
+    }
+
     bool operator==(const QMimeMagicRuleMatcher &other) const;
 
     void addRule(const QMimeMagicRule &rule);
@@ -83,6 +90,7 @@ private:
     unsigned m_priority;
     QString m_mimetype;
 };
+Q_DECLARE_SHARED(QMimeMagicRuleMatcher)
 
 QT_END_NAMESPACE