qt, refactor: Use enum type as switch argument in PeerTableModel

Author: hebasto

src/qt/peertablemodel.cpp

@@ -23,8 +23,7 @@ bool NodeLessThan::operator()(const CNodeCombinedStats &left, const CNodeCombine
     if (order == Qt::DescendingOrder)
         std::swap(pLeft, pRight);
 
-    switch(column)
-    {
+    switch (static_cast<PeerTableModel::ColumnIndex>(column)) {
     case PeerTableModel::NetNodeId:
         return pLeft->nodeid < pRight->nodeid;
     case PeerTableModel::Address:
@@ -41,9 +40,8 @@ bool NodeLessThan::operator()(const CNodeCombinedStats &left, const CNodeCombine
         return pLeft->nRecvBytes < pRight->nRecvBytes;
     case PeerTableModel::Subversion:
         return pLeft->cleanSubVer.compare(pRight->cleanSubVer) < 0;
-    }
-
-    return false;
+    } // no default case, so the compiler can warn about missing cases
+    assert(false);
 }
 
 // private implementation
@@ -157,9 +155,9 @@ QVariant PeerTableModel::data(const QModelIndex &index, int role) const
 
     CNodeCombinedStats *rec = static_cast<CNodeCombinedStats*>(index.internalPointer());
 
+    const auto column = static_cast<ColumnIndex>(index.column());
     if (role == Qt::DisplayRole) {
-        switch(index.column())
-        {
+        switch (column) {
         case NetNodeId:
             return (qint64)rec->nodeStats.nodeid;
         case Address:
@@ -177,19 +175,24 @@ QVariant PeerTableModel::data(const QModelIndex &index, int role) const
             return GUIUtil::formatBytes(rec->nodeStats.nRecvBytes);
         case Subversion:
             return QString::fromStdString(rec->nodeStats.cleanSubVer);
-        }
+        } // no default case, so the compiler can warn about missing cases
+        assert(false);
     } else if (role == Qt::TextAlignmentRole) {
-        switch (index.column()) {
-            case ConnectionType:
-            case Network:
-                return QVariant(Qt::AlignCenter);
-            case Ping:
-            case Sent:
-            case Received:
-                return QVariant(Qt::AlignRight | Qt::AlignVCenter);
-            default:
-                return QVariant();
-        }
+        switch (column) {
+        case NetNodeId:
+        case Address:
+            return {};
+        case ConnectionType:
+        case Network:
+            return QVariant(Qt::AlignCenter);
+        case Ping:
+        case Sent:
+        case Received:
+            return QVariant(Qt::AlignRight | Qt::AlignVCenter);
+        case Subversion:
+            return {};
+        } // no default case, so the compiler can warn about missing cases
+        assert(false);
     } else if (role == StatsRole) {
         switch (index.column()) {
         case NetNodeId: return QVariant::fromValue(rec);