Allow direct QVariant creation from some QGIS metatypes

python/core/geometry/qgsgeometry.sip

@@ -774,5 +774,8 @@ class QgsGeometry
      */
     static void convertPointList( const QList<QgsPointV2>& input, QList<QgsPoint>& output );
 
+    //! Allows direct construction of QVariants from geometry.
+    operator QVariant() const;
+
 }; // class QgsGeometry
 

python/core/qgsfeature.sip

@@ -496,6 +496,9 @@ class QgsFeature
      */
     int fieldNameIndex( const QString& fieldName ) const;
 
+    //! Allows direct construction of QVariants from features.
+    operator QVariant() const;
+
 }; // class QgsFeature
 
 typedef QSet<qint64> QgsFeatureIds;

python/core/qgsfield.sip

@@ -167,6 +167,10 @@ class QgsField
 
     return NULL;
 %End
+
+    //! Allows direct construction of QVariants from fields.
+    operator QVariant() const;
+
 }; // class QgsField
 
 
@@ -364,6 +368,9 @@ class QgsFields
       }
     %End
 
+    //! Allows direct construction of QVariants from fields.
+    operator QVariant() const;
+
 /*  SIP_PYOBJECT __getitem__(int key);
 %MethodCode
   if (a0 = sipConvertFromSequenceIndex(a0, sipCpp->count()) < 0)

python/core/qgsinterval.sip

@@ -132,5 +132,8 @@ class QgsInterval
      */
     static QgsInterval fromString( const QString& string );
 
+    //! Allows direct construction of QVariants from intervals.
+    operator QVariant() const;
+
 };
 

src/core/geometry/qgsgeometry.h

@@ -819,6 +819,12 @@ class CORE_EXPORT QgsGeometry
      */
     static void convertPointList( const QgsPointSequenceV2 &input, QList<QgsPoint> &output );
 
+    //! Allows direct construction of QVariants from geometry.
+    operator QVariant() const
+    {
+      return QVariant::fromValue( *this );
+    }
+
   private:
 
     QgsGeometryPrivate* d; //implicitely shared data pointer

src/core/qgsfeature.h

@@ -413,6 +413,12 @@ class CORE_EXPORT QgsFeature
      */
     int fieldNameIndex( const QString& fieldName ) const;
 
+    //! Allows direct construction of QVariants from features.
+    operator QVariant() const
+    {
+      return QVariant::fromValue( *this );
+    }
+
   private:
 
     QExplicitlySharedDataPointer<QgsFeaturePrivate> d;

src/core/qgsfield.h

@@ -153,6 +153,12 @@ class CORE_EXPORT QgsField
      */
     bool convertCompatible( QVariant& v ) const;
 
+    //! Allows direct construction of QVariants from fields.
+    operator QVariant() const
+    {
+      return QVariant::fromValue( *this );
+    }
+
   private:
 
     QSharedDataPointer<QgsFieldPrivate> d;
@@ -288,6 +294,12 @@ class CORE_EXPORT QgsFields
      */
     QIcon iconForField( int fieldIdx ) const;
 
+    //! Allows direct construction of QVariants from fields.
+    operator QVariant() const
+    {
+      return QVariant::fromValue( *this );
+    }
+
     ///@cond PRIVATE
 
     class const_iterator;

src/core/qgsinterval.h

@@ -155,6 +155,12 @@ class CORE_EXPORT QgsInterval
      */
     static QgsInterval fromString( const QString& string );
 
+    //! Allows direct construction of QVariants from intervals.
+    operator QVariant() const
+    {
+      return QVariant::fromValue( *this );
+    }
+
   private:
 
     //! Duration of interval in seconds