QtDialog: add reference in foreach

Source/QtDialog/CMakeSetupDialog.cxx

@@ -990,10 +990,10 @@ void CMakeSetupDialog::removeSelectedCacheEntries()
 {
   QModelIndexList idxs = this->CacheValues->selectionModel()->selectedRows();
   QList<QPersistentModelIndex> pidxs;
-  foreach (QModelIndex i, idxs) {
+  foreach (QModelIndex const& i, idxs) {
     pidxs.append(i);
   }
-  foreach (QPersistentModelIndex pi, pidxs) {
+  foreach (QPersistentModelIndex const& pi, pidxs) {
     this->CacheValues->model()->removeRow(pi.row(), pi.parent());
   }
 }
@@ -1152,7 +1152,7 @@ void CMakeSetupDialog::showUserChanges()
   QString command;
   QString cache;
 
-  foreach (QCMakeProperty prop, changes) {
+  foreach (QCMakeProperty const& prop, changes) {
     QString type;
     switch (prop.Type) {
       case QCMakeProperty::BOOL:

Source/QtDialog/QCMake.cxx

@@ -219,14 +219,14 @@ void QCMake::setProperties(const QCMakePropertyList& newProps)
   }
 
   // remove some properites
-  foreach (QString s, toremove) {
+  foreach (QString const& s, toremove) {
     this->CMakeInstance->UnwatchUnusedCli(s.toLocal8Bit().data());
 
     state->RemoveCacheEntry(s.toLocal8Bit().data());
   }
 
   // add some new properites
-  foreach (QCMakeProperty s, props) {
+  foreach (QCMakeProperty const& s, props) {
     this->CMakeInstance->WatchUnusedCli(s.Key.toLocal8Bit().data());
 
     if (s.Type == QCMakeProperty::BOOL) {

Source/QtDialog/QCMakeCacheView.cxx

@@ -47,7 +47,7 @@ protected:
     }
 
     // check all strings for a match
-    foreach (QString str, strs) {
+    foreach (QString const& str, strs) {
       if (str.contains(this->filterRegExp())) {
         return true;
       }
@@ -236,12 +236,12 @@ void QCMakeCacheModel::setProperties(const QCMakePropertyList& props)
     qSort(newP);
     qSort(newP2);
     int row_count = 0;
-    foreach (QCMakeProperty p, newP) {
+    foreach (QCMakeProperty const& p, newP) {
       this->insertRow(row_count);
       this->setPropertyData(this->index(row_count, 0), p, true);
       row_count++;
     }
-    foreach (QCMakeProperty p, newP2) {
+    foreach (QCMakeProperty const& p, newP2) {
       this->insertRow(row_count);
       this->setPropertyData(this->index(row_count, 0), p, false);
       row_count++;
@@ -399,7 +399,7 @@ void QCMakeCacheModel::breakProperties(
 {
   QMap<QString, QCMakePropertyList> tmp;
   // return a map of properties grouped by prefixes, and sorted
-  foreach (QCMakeProperty p, props) {
+  foreach (QCMakeProperty const& p, props) {
     QString prefix = QCMakeCacheModel::prefix(p.Key);
     tmp[prefix].append(p);
   }