Add qHash(QMimeType)

QMimeTypes can be compared for equality, so qHash should be overloaded, too.

[ChangeLog][QtCore][QMimeType] Added qHash(QMimeType).

Change-Id: I32608760cb7ef5e47f49192d0205cdca3d4e1765
Reviewed-by: David Faure <david.faure@kdab.com>

src/corelib/mimetypes/qmimetype.cpp

@@ -43,6 +43,7 @@
 
 #include <QtCore/QDebug>
 #include <QtCore/QLocale>
+#include <QtCore/QHashFunctions>
 
 #include <memory>
 
@@ -180,6 +181,18 @@ bool QMimeType::operator==(const QMimeType &other) const
     return d == other.d || d->name == other.d->name;
 }
 
+/*!
+    \since 5.6
+    \relates QMimeType
+
+    Returns the hash value for \a key, using
+    \a seed to seed the calculation.
+ */
+uint qHash(const QMimeType &key, uint seed) Q_DECL_NOTHROW
+{
+    return qHash(key.d->name, seed);
+}
+
 /*!
     \fn bool QMimeType::operator!=(const QMimeType &other) const;
     Returns \c true if \a other does not equal this QMimeType object, otherwise returns \c false.

src/corelib/mimetypes/qmimetype.h

@@ -46,6 +46,9 @@ QT_BEGIN_NAMESPACE
 class QMimeTypePrivate;
 class QFileinfo;
 class QStringList;
+class QMimeType;
+
+Q_CORE_EXPORT uint qHash(const QMimeType &key, uint seed = 0) Q_DECL_NOTHROW;
 
 class Q_CORE_EXPORT QMimeType
 {
@@ -100,6 +103,7 @@ protected:
     friend class QMimeXMLProvider;
     friend class QMimeBinaryProvider;
     friend class QMimeTypePrivate;
+    friend Q_CORE_EXPORT uint qHash(const QMimeType &key, uint seed) Q_DECL_NOTHROW;
 
     QExplicitlySharedDataPointer<QMimeTypePrivate> d;
 };