Add missing const to equality operator

Author: nyalldawson

python/core/qgsdatadefined.sip

@@ -76,7 +76,7 @@ class QgsDataDefined
      */
     bool setFromXmlElement( const QDomElement& element );
 
-    bool operator==( const QgsDataDefined &other );
-    bool operator!=( const QgsDataDefined &other );
+    bool operator==( const QgsDataDefined &other ) const;
+    bool operator!=( const QgsDataDefined &other ) const;
 
 };

src/core/qgsdatadefined.cpp

@@ -161,13 +161,13 @@ bool QgsDataDefined::setFromXmlElement( const QDomElement &element )
   return true;
 }
 
-bool QgsDataDefined::operator==( const QgsDataDefined &other )
+bool QgsDataDefined::operator==( const QgsDataDefined &other ) const
 {
   return other.isActive() == mActive && other.useExpression() == mUseExpression &&
          other.field() == mField && other.expressionString() == mExpressionString;
 }
 
-bool QgsDataDefined::operator!=( const QgsDataDefined &other )
+bool QgsDataDefined::operator!=( const QgsDataDefined &other ) const
 {
   return !( *this == other );
 }

src/core/qgsdatadefined.h

@@ -98,8 +98,8 @@ class CORE_EXPORT QgsDataDefined
      */
     bool setFromXmlElement( const QDomElement& element );
 
-    bool operator==( const QgsDataDefined &other );
-    bool operator!=( const QgsDataDefined &other );
+    bool operator==( const QgsDataDefined &other ) const;
+    bool operator!=( const QgsDataDefined &other ) const;
 
   private:
     QgsExpression* mExpression;