Rewrite all core header usages of Q_FOREACH

python/core/qgsrelation.sip.in

@@ -238,7 +238,7 @@ The second element of each pair are the field names of the matching primary key.
 %MethodCode
     const QList< QgsRelation::FieldPair > &pairs = sipCpp->fieldPairs();
     sipRes = new QMap< QString, QString >();
-    Q_FOREACH ( const QgsRelation::FieldPair &pair, pairs )
+    for ( const QgsRelation::FieldPair &pair : pairs )
     {
       sipRes->insert( pair.first, pair.second );
     }

src/core/qgsexpressionsorter.h

@@ -36,7 +36,7 @@ class QgsExpressionSorter
     bool operator()( const QgsIndexedFeature &f1, const QgsIndexedFeature &f2 ) const
     {
       int i = 0;
-      Q_FOREACH ( const QgsFeatureRequest::OrderByClause &orderBy, mPreparedOrderBys )
+      for ( const QgsFeatureRequest::OrderByClause &orderBy : qgis::as_const( mPreparedOrderBys ) )
       {
         const QVariant &v1 = f1.mIndexes.at( i );
         const QVariant &v2 = f2.mIndexes.at( i );
@@ -143,15 +143,15 @@ class QgsExpressionSorter
 
       QgsIndexedFeature indexedFeature;
 
-      Q_FOREACH ( const QgsFeature &f, features )
+      for ( const QgsFeature &f : qgis::as_const( features ) )
       {
         indexedFeature.mIndexes.resize( mPreparedOrderBys.size() );
         indexedFeature.mFeature = f;
 
         expressionContext->setFeature( indexedFeature.mFeature );
 
         int i = 0;
-        Q_FOREACH ( const QgsFeatureRequest::OrderByClause &orderBy, mPreparedOrderBys )
+        for ( const QgsFeatureRequest::OrderByClause &orderBy : qgis::as_const( mPreparedOrderBys ) )
         {
           indexedFeature.mIndexes.replace( i++, orderBy.expression().evaluate( expressionContext ) );
         }
@@ -164,7 +164,7 @@ class QgsExpressionSorter
 
       features.clear();
 
-      Q_FOREACH ( const QgsIndexedFeature &indexedFeature, indexedFeatures )
+      for ( const QgsIndexedFeature &indexedFeature : qgis::as_const( indexedFeatures ) )
         features.append( indexedFeature.mFeature );
     }
 

src/core/qgsmaplayerlistutils.h

@@ -35,7 +35,7 @@ inline QList<QgsMapLayer *> _qgis_listQPointerToRaw( const QgsWeakMapLayerPointe
 {
   QList<QgsMapLayer *> lst;
   lst.reserve( layers.count() );
-  Q_FOREACH ( const QgsWeakMapLayerPointer &layerPtr, layers )
+  for ( const QgsWeakMapLayerPointer &layerPtr : layers )
   {
     if ( layerPtr )
       lst.append( layerPtr.data() );
@@ -47,7 +47,7 @@ inline QgsWeakMapLayerPointerList _qgis_listRawToQPointer( const QList<QgsMapLay
 {
   QgsWeakMapLayerPointerList lst;
   lst.reserve( layers.count() );
-  Q_FOREACH ( QgsMapLayer *layer, layers )
+  for ( QgsMapLayer *layer : layers )
   {
     lst.append( layer );
   }
@@ -58,7 +58,7 @@ inline QList<QgsMapLayer *> _qgis_listRefToRaw( const QList< QgsMapLayerRef > &l
 {
   QList<QgsMapLayer *> lst;
   lst.reserve( layers.count() );
-  Q_FOREACH ( const QgsMapLayerRef &layer, layers )
+  for ( const QgsMapLayerRef &layer : layers )
   {
     if ( layer )
       lst.append( layer.get() );
@@ -70,7 +70,7 @@ inline QList< QgsMapLayerRef > _qgis_listRawToRef( const QList<QgsMapLayer *> &l
 {
   QList< QgsMapLayerRef > lst;
   lst.reserve( layers.count() );
-  Q_FOREACH ( QgsMapLayer *layer, layers )
+  for ( QgsMapLayer *layer : layers )
   {
     lst.append( QgsMapLayerRef( layer ) );
   }
@@ -92,7 +92,7 @@ inline QStringList _qgis_listQPointerToIDs( const QgsWeakMapLayerPointerList &la
 {
   QStringList lst;
   lst.reserve( layers.count() );
-  Q_FOREACH ( const QgsWeakMapLayerPointer &layerPtr, layers )
+  for ( const QgsWeakMapLayerPointer &layerPtr : layers )
   {
     if ( layerPtr )
       lst << layerPtr->id();
@@ -107,7 +107,7 @@ inline static QgsMapLayer *_qgis_findLayer( const QList< QgsMapLayer *> &layers,
   QgsMapLayer *matchNameInsensitive = nullptr;
 
   // Look for match against layer IDs
-  Q_FOREACH ( QgsMapLayer *layer, layers )
+  for ( QgsMapLayer *layer : layers )
   {
     if ( !matchId && layer->id() == identifier )
     {

src/core/qgsmaplayerref.h

@@ -171,7 +171,8 @@ struct _LayerRef
 
     if ( project && !name.isEmpty() )
     {
-      Q_FOREACH ( QgsMapLayer *l, project->mapLayersByName( name ) )
+      const QList<QgsMapLayer *> layers = project->mapLayersByName( name );
+      for ( QgsMapLayer *l : layers )
       {
         if ( TYPE *tl = qobject_cast< TYPE *>( l ) )
         {

src/core/qgsrelation.h

@@ -296,7 +296,7 @@ class CORE_EXPORT QgsRelation
     % MethodCode
     const QList< QgsRelation::FieldPair > &pairs = sipCpp->fieldPairs();
     sipRes = new QMap< QString, QString >();
-    Q_FOREACH ( const QgsRelation::FieldPair &pair, pairs )
+    for ( const QgsRelation::FieldPair &pair : pairs )
     {
       sipRes->insert( pair.first, pair.second );
     }

src/core/qgsrulebasedlabeling.cpp

@@ -86,6 +86,17 @@ void QgsRuleBasedLabeling::Rule::setSettings( QgsPalLayerSettings *settings )
   mSettings = settings;
 }
 
+QgsRuleBasedLabeling::RuleList QgsRuleBasedLabeling::Rule::descendants() const
+{
+  RuleList l;
+  for ( Rule *c : mChildren )
+  {
+    l += c;
+    l += c->descendants();
+  }
+  return l;
+}
+
 void QgsRuleBasedLabeling::Rule::initFilter()
 {
   if ( mElseRule || mFilterExp.compare( QLatin1String( "ELSE" ), Qt::CaseInsensitive ) == 0 )

src/core/qgsrulebasedlabeling.h

@@ -203,7 +203,7 @@ class CORE_EXPORT QgsRuleBasedLabeling : public QgsAbstractVectorLayerLabeling
          *
          * \returns A list of descendant rules
          */
-        QgsRuleBasedLabeling::RuleList descendants() const { RuleList l; Q_FOREACH ( Rule *c, mChildren ) { l += c; l += c->descendants(); } return l; }
+        QgsRuleBasedLabeling::RuleList descendants() const;
 
         /**
          * The parent rule

src/core/qgssqlstatement.cpp

@@ -251,6 +251,14 @@ bool QgsSQLStatement::doBasicValidationChecks( QString &errorMsgOut ) const
 ///////////////////////////////////////////////
 // nodes
 
+void QgsSQLStatement::NodeList::accept( QgsSQLStatement::Visitor &v ) const
+{
+  for ( QgsSQLStatement::Node *node : mList )
+  {
+    node->accept( v );
+  }
+}
+
 QgsSQLStatement::NodeList *QgsSQLStatement::NodeList::clone() const
 {
   NodeList *nl = new NodeList;

src/core/qgssqlstatement.h

@@ -301,7 +301,7 @@ class CORE_EXPORT QgsSQLStatement
         int count() const { return mList.count(); }
 
         //! Accept visitor
-        void accept( QgsSQLStatement::Visitor &v ) const { Q_FOREACH ( QgsSQLStatement::Node *node, mList ) { node->accept( v ); } }
+        void accept( QgsSQLStatement::Visitor &v ) const;
 
         //! Creates a deep copy of this list. Ownership is transferred to the caller
         QgsSQLStatement::NodeList *clone() const SIP_FACTORY;

src/core/symbology/qgscolorbrewerpalette.cpp

@@ -291,3 +291,56 @@ const char *QgsColorBrewerPalette::BREWER_STRING =
   "PuBuGn-7-246,239,247 208,209,230 166,189,219 103,169,207 54,144,192 2,129,138 1,100,80\n"
   "PuBuGn-8-255,247,251 236,226,240 208,209,230 166,189,219 103,169,207 54,144,192 2,129,138 1,100,80\n"
   "PuBuGn-9-255,247,251 236,226,240 208,209,230 166,189,219 103,169,207 54,144,192 2,129,138 1,108,89 1,70,54";
+
+QList<QColor> QgsColorBrewerPalette::listSchemeColors( const QString &schemeName, int colors )
+{
+  QList<QColor> pal;
+  QString palette( BREWER_STRING );
+  const QStringList list = palette.split( QChar( '\n' ) );
+  for ( const QString &entry : list )
+  {
+    QStringList items = entry.split( QChar( '-' ) );
+    if ( items.count() != 3 || items[0] != schemeName || items[1].toInt() != colors )
+      continue;
+    const QStringList colors = items[2].split( QChar( ' ' ) );
+    for ( const QString &clr : colors )
+    {
+      pal << QgsSymbolLayerUtils::parseColor( clr );
+    }
+  }
+  return pal;
+}
+
+QStringList QgsColorBrewerPalette::listSchemes()
+{
+  QStringList schemes;
+
+  QString palette( BREWER_STRING );
+  const QStringList list = palette.split( QChar( '\n' ) );
+  for ( const QString &entry : list )
+  {
+    QStringList items = entry.split( QChar( '-' ) );
+    if ( items.count() != 3 )
+      continue;
+    if ( !schemes.contains( items[0] ) )
+      schemes << items[0];
+  }
+  return schemes;
+}
+
+QList<int> QgsColorBrewerPalette::listSchemeVariants( const QString &schemeName )
+{
+  QList<int> variants;
+
+  QString palette( BREWER_STRING );
+  const QStringList list = palette.split( QChar( '\n' ) );
+  for ( const QString &entry : list )
+  {
+    QStringList items = entry.split( QChar( '-' ) );
+    if ( items.count() != 3 || items[0] != schemeName )
+      continue;
+    variants << items[1].toInt();
+  }
+
+  return variants;
+}

src/core/symbology/qgscolorbrewerpalette.h

@@ -28,58 +28,11 @@
 class CORE_EXPORT QgsColorBrewerPalette
 {
   public:
-    static QList<QColor> listSchemeColors( const QString &schemeName, int colors )
-    {
-      QList<QColor> pal;
-      QString palette( BREWER_STRING );
-      QStringList list = palette.split( QChar( '\n' ) );
-      Q_FOREACH ( const QString &entry, list )
-      {
-        QStringList items = entry.split( QChar( '-' ) );
-        if ( items.count() != 3 || items[0] != schemeName || items[1].toInt() != colors )
-          continue;
-        QStringList colors = items[2].split( QChar( ' ' ) );
-        Q_FOREACH ( const QString &clr, colors )
-        {
-          pal << QgsSymbolLayerUtils::parseColor( clr );
-        }
-      }
-      return pal;
-    }
+    static QList<QColor> listSchemeColors( const QString &schemeName, int colors );
 
-    static QStringList listSchemes()
-    {
-      QStringList schemes;
+    static QStringList listSchemes();
 
-      QString palette( BREWER_STRING );
-      QStringList list = palette.split( QChar( '\n' ) );
-      Q_FOREACH ( const QString &entry, list )
-      {
-        QStringList items = entry.split( QChar( '-' ) );
-        if ( items.count() != 3 )
-          continue;
-        if ( !schemes.contains( items[0] ) )
-          schemes << items[0];
-      }
-      return schemes;
-    }
-
-    static QList<int> listSchemeVariants( const QString &schemeName )
-    {
-      QList<int> variants;
-
-      QString palette( BREWER_STRING );
-      QStringList list = palette.split( QChar( '\n' ) );
-      Q_FOREACH ( const QString &entry, list )
-      {
-        QStringList items = entry.split( QChar( '-' ) );
-        if ( items.count() != 3 || items[0] != schemeName )
-          continue;
-        variants << items[1].toInt();
-      }
-
-      return variants;
-    }
+    static QList<int> listSchemeVariants( const QString &schemeName );
 
     // extracted ColorBrewer data
     static const char *BREWER_STRING;

src/core/symbology/qgsrulebasedrenderer.cpp

@@ -701,6 +701,17 @@ QgsRuleBasedRenderer::Rule *QgsRuleBasedRenderer::Rule::create( QDomElement &rul
   return rule;
 }
 
+QgsRuleBasedRenderer::RuleList QgsRuleBasedRenderer::Rule::descendants() const
+{
+  RuleList l;
+  for ( QgsRuleBasedRenderer::Rule *c : mChildren )
+  {
+    l += c;
+    l += c->descendants();
+  }
+  return l;
+}
+
 QgsRuleBasedRenderer::Rule *QgsRuleBasedRenderer::Rule::createFromSld( QDomElement &ruleElem, QgsWkbTypes::GeometryType geomType )
 {
   if ( ruleElem.localName() != QLatin1String( "Rule" ) )

src/core/symbology/qgsrulebasedrenderer.h

@@ -84,7 +84,7 @@ class CORE_EXPORT QgsRuleBasedRenderer : public QgsFeatureRenderer
     struct RenderLevel
     {
       explicit RenderLevel( int z ): zIndex( z ) {}
-      ~RenderLevel() { Q_FOREACH ( RenderJob *j, jobs ) delete j; }
+      ~RenderLevel() { qDeleteAll( jobs ); }
       int zIndex;
 
       //! List of jobs to render, owned by this object.
@@ -95,7 +95,7 @@ class CORE_EXPORT QgsRuleBasedRenderer : public QgsFeatureRenderer
         zIndex = rh.zIndex;
         qDeleteAll( jobs );
         jobs.clear();
-        Q_FOREACH ( RenderJob *job, rh.jobs )
+        for ( RenderJob *job :  qgis::as_const( rh.jobs ) )
         {
           jobs << new RenderJob( *job );
         }
@@ -105,7 +105,7 @@ class CORE_EXPORT QgsRuleBasedRenderer : public QgsFeatureRenderer
       RenderLevel( const QgsRuleBasedRenderer::RenderLevel &other )
         : zIndex( other.zIndex )
       {
-        Q_FOREACH ( RenderJob *job, other.jobs )
+        for ( RenderJob *job : qgis::as_const( other.jobs ) )
         {
           jobs << new RenderJob( *job );
         }
@@ -381,7 +381,7 @@ class CORE_EXPORT QgsRuleBasedRenderer : public QgsFeatureRenderer
          *
          * \returns A list of descendant rules
          */
-        QgsRuleBasedRenderer::RuleList descendants() const { RuleList l; Q_FOREACH ( QgsRuleBasedRenderer::Rule *c, mChildren ) { l += c; l += c->descendants(); } return l; }
+        QgsRuleBasedRenderer::RuleList descendants() const;
 
         /**
          * The parent rule